noun · 3 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
UK:/ˌɛm.ɛmˈəʊ/
US:/ˌɛm.ɛmˈoʊ/
1
noun
Meaning 1
Initialism of massively multiplayer online game.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, initialism
Topics: video-games
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
Maximum operating Mach number; the Mach number which an aircraft should not exceed in the course of routine operation.
Definition source: English Wiktionary via Wiktextract