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IMO

American

Also imo, or IMHO

abbreviation

in my (honest/humble) opinion.

IMO ¹ British

abbreviation

text messaging in my opinion
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

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.

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

The IMO head said he "will take this instruction very seriously", calling the measure "of particular operational importance" which showed "we value seafarers".

From Barron's • Mar. 19, 2026

The number of falsely flagged ships globally more than doubled last year to over 450, according to the IMO, the BBC reported in November.

From BBC • Feb. 10, 2026

Last year, it obtained a new IMO number in a move that analysts said was almost unheard of.

From BBC • Jan. 23, 2026

According to "The Economist", the IMO believes that half of all incidents remain untold.

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