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  • mo
    mo
    noun
  • Mo
    Mo
    molybdenum.
  • MO
    MO
    abbreviation
    method of operation.
  • -mo
    -mo
    a suffix occurring in a series of compounds that describe book sizes according to the number of leaves formed by the folding of a single sheet of paper.
  • mo.
    mo.
    abbreviation
    month.
  • Mo.
    Mo.
    abbreviation
    Missouri.
  • m.o.
    m.o.
    abbreviation
    mail order.
  • M.O.
    M.O.
    abbreviation
    mail order.
Synonyms

mo

1 American  
[moh] / moʊ /

noun

Informal.
  1. moment.


Mo 2 American  
Symbol, Chemistry.
  1. molybdenum.


MO 3 American  

abbreviation

  1. method of operation.

  2. Missouri (approved especially for use with zip code).

  3. mode of operation.

  4. modus operandi.


-mo 4 American  
  1. a suffix occurring in a series of compounds that describe book sizes according to the number of leaves formed by the folding of a single sheet of paper.

    sixteenmo.


mo. 5 American  

abbreviation

  • mos
    plural
  1. month.

  2. months.


Mo. 6 American  

abbreviation

  1. Missouri.

  2. Monday.


m.o. 7 American  

abbreviation

  1. mail order.

  2. modus operandi.

  3. money order.


M.O. 8 American  

abbreviation

  1. mail order.

  2. manually operated.

  3. Medical Officer.

  4. method of operation.

  5. mode of operation.

  6. modus operandi.

  7. money order.


MO 1 British  

abbreviation

  1. Missouri

  2. Medical Officer

  3. modus operandi

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

mo 2 British  
/ məʊ /

noun

  1. short for moment

  2. short for moustache

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

m.o. 3 British  

abbreviation

  1. mail order

  2. money order

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Mo 4 British  

symbol

  1. molybdenum

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Mo. 5 British  

abbreviation

  1. Missouri

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

-mo 6 British  

suffix

  1. (in bookbinding) indicating book size by specifying the number of leaves formed by folding one sheet of paper

    12mo, twelvemo, or duodecimo

    16mo or sixteenmo

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

mo 7 British  

abbreviation

  1. Macau

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

What else does MO mean? MO—it's a multifunctional set of letters. MO is commonly used as an abbreviation for modus operandi, meaning “mode of operating or working.” It’s also commonly a postal abbreviation for Missouri. You may not always encounter mo in uppercase letters in informal contexts in digital communication. So, two other widespread, popular uses of mo you may encounter are: Mo, a guy’s name, and mo, a dialectical pronunciation of more. In the U. K. and other English-speaking places around the world, mo is a slang shortening of the word moment. How is MO pronounced?[ em-oh ] or [ moh ]What are some variants of MO?or M. O. or mo' or moWhat are some other words related to MO?

Etymology

Origin of mo1

By shortening

Origin of -mo4

Combining form extracted from duodecimo

Vocabulary lists containing mo

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Her improvised chorus is simple; a dozen times, she repeats “Mo ti de, mo ti de le,” which means “I’ve arrived. I’ve come home” in Yoruba.

From Los Angeles Times Sep. 21, 2023

Although history does not celebrate the first skin-eaters, cultures around the world enjoy their recipes — whether Brazilian torresmos, Canadian scrunchions, Indonesian krupuk kulit, Jewish gribenes, Mexican cueritos, Slavic cvarci or Vietnamese tóp mo.

From Washington Post Feb. 21, 2023

Going on hour 17 of no power with a 1 mo old.

From Seattle Times Oct. 25, 2021

It can do all the modes that matter in terms of 4K and slow mo and handles them all super well.

From The Verge Sep. 21, 2021

The door burst inward, and Skahaz mo Kandaq stormed in with four Brazen Beasts behind him.

From "A Dance with Dragons" by George R. R. Martin

Mo Almalarashid arrived in Greenock in 2018 as a Syrian refugee without a word of English.

From BBC Aug. 21, 2026

California craft beer pioneer Stone Brewing will close three Escondido locations and lay off hundreds of workers as production moves to Paso Robles and Kansas City, Mo.

From Los Angeles Times Aug. 21, 2026

Whether he is pulling a pint, tossing a builder's helmet in the air or running with Olympic medallist Mo Farah, the UK's new prime minister Andy Burnham has embraced social media with a deft touch.

From Barron's Aug. 16, 2026

In recent weeks, officers have broadened their approach to make more arrests near gates and ticket counters at airports from San Francisco to Miami and Kansas City, Mo.

From The Wall Street Journal Aug. 6, 2026

She'd assured me I'd adjust to him being gone, but two years later Mo still felt as real as ever.

From "City of the Plague God" by Sarwat Chadda

There needs to be a "different MO", he said.

From BBC Sep. 11, 2026

Altria MO -0.77%decrease; red down pointing triangle reported lower fourth-quarter profit as cigarette shipment volume declined, dragging down its smokeable product business.

From The Wall Street Journal Jan. 29, 2026

Rory turns into sandworm fodder the second he admits his slimy MO, suggesting that the smarmy leech was beyond redemption.

From Salon Sep. 9, 2024

But the specific deal with Alonso, a free agent after this season, would be a departure from the Mariners’ typical MO under Jerry Dipoto.

From Seattle Times Jun. 1, 2024

“Oh, big surprise. Maddie’s running away! That’s your MO anytime you come across something you don’t know how to handle.”

From "From Twinkle, with Love" by Sandhya Menon

“It’s key that need for reform is understood, but we don’t need 6 mo. of study,” he wrote.

From New York Times Oct. 22, 2020

At Worland, Wyo., lives Doris Johnson, 19 mo., one of many U. S. children crippled by burns.

From Time Magazine Archive

Coursers competed for three stakes: the Sapling, for hounds under 16 mo.; the Futurity, for those under 22 mo.; the Derby, an all-age event which is called the Waterloo at the Coursing Association's autumn meet.

From Time Magazine Archive

Put a baby's clothes over him feet first until he reaches 6 mo. to keep him from growing up stunted.

From Time Magazine Archive

Riverside Day Nursery, 121 West 63d St.   1 mo. to 8 yrs.

From The Children of the Poor by Jacob A. (Jacob August) Riis

In Independence, Mo., one city councilman lost a recall vote Tuesday by 68% due to his support for a data center.

From Los Angeles Times Sep. 7, 2026

Seth Hansen, the owner of the Trump Store Branson in Branson, Mo., said that while sales are lower than the election-year high, business is still good.

From The Wall Street Journal Sep. 6, 2026

With one child and another on the way, the couple has since sold that house and purchased another in St. Louis, Mo. They moved to the more-affordable city to be closer to family.

From MarketWatch Sep. 1, 2026

They were written in Kansas City, Mo., by a private nonprofit.

From The Wall Street Journal Aug. 28, 2026

"It's a raven," said Mo. "It's going to lead you home."

From "City of the Plague God" by Sarwat Chadda

And causing other people’s pain is not in my m.o.

From Salon May 2, 2019

It’s a shame not to hear the instrument more, but there are moments when the vocals-heavy m.o. makes sense.

From New York Times Aug. 24, 2018

Its m.o., sour beers and Neapolitan-style pizza, continues at the new Fremont location, but there will be an extensive fresh-pasta menu, sandwiches, tacos and a full bar with a biodynamic wine program.

From Seattle Times Dec. 4, 2017

“That's kind of the m.o. of who wins ballgames,” USC Coach Clay Helton said.

From Los Angeles Times Nov. 15, 2016

Yeah, that’s always been our m.o., is that we always do stuff we like.

From Slate Mar. 16, 2015

The fact that a quartet of such caliber signed on to this dreck would be surprising if Netflix’s M.O. weren’t trapping great actors in middling movies.

From Salon Sep. 2, 2026

"I feel like in my career I've won on tough golf courses generally, so that's my M.O., I would say," said 2025 Masters runner-up Rose, who led by a shot after an opening-round 62.

From BBC Jan. 31, 2026

Bending Spoons’ M.O. is apparent from even a cursory look at its portfolio and record.

From Slate Jan. 23, 2026

With its slow pacing, shaky handheld cameras, dishwater cinematography and unnervingly extreme closeups, it feels more like an intense indie drama than a whimsical tale of a robber with a peculiar M.O.

From The Wall Street Journal Oct. 9, 2025

One of the last patients to leave by train was Wetherall, who at this crisis passed under the care of Stobie, the Oxfords' old M.O.

From The Story of the 2/4th Oxfordshire and Buckinghamshire Light Infantry by Geoffrey Keith Rose

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