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IMO

American  
Also imo, or IMHO

abbreviation

  1. in my (honest/humble) opinion.

IMO 1 British  

abbreviation

  1. text messaging in my opinion

  2. International Maritime Organization

"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
Imo 2 British  
/ ˈiːməʊ /

noun

  1. a state of SE Nigeria. Capital: Owerri. Pop:3 934 899 (2006). Area: 5100 sq km (1969 sq miles)

"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

Etymology

Origin of IMO

First recorded in 1980–85; from its use in digital communications

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.

The IMO has information that some ships have started to sail but that it still needed to verify this as "some ships turn off their identification systems in order not to be targeted", he said.

From BBC • Apr. 17, 2026

Even so, she has ditched Max in favour of IMO, a less popular US-made app that has encryption.

From Barron's • Mar. 23, 2026

Around 20,000 seafarers remained stranded on some 3,200 vessels west of the Strait of Hormuz, according to the IMO.

From Barron's • Mar. 20, 2026

After a period sailing under the false identity Sea Shell, using a different stolen IMO number, the Gale again changed identities, re-emerging as Beeta and loading a cargo of Iranian oil on 31 January.

From BBC • Feb. 10, 2026

The IMO is a proponent of a technology to apply encrypted "digital signatures" to electronic bills of lading.

From Crime and Corruption by Vaknin, Samuel

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.