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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.

Come October, other maritime industries may face the same dilemma if there is no final decision on the IMO plan.

From The Wall Street Journal • Apr. 20, 2026

Mr. Trump will have to keep a close watch on the IMO if he wants these plans to succeed.

From The Wall Street Journal • Apr. 20, 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

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

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