maoi mao • maoism · · · Info · Definitions · Synonyms · Characters · · maoi · · Text Latin · · Script 4 · · Length 2 · · Syllables Definitions · · · (noun) any of a group of antidepressant drugs that inhibit the action of monoamine oxidase in the brain and so allow monoamines to accumulate. Synonyms: monoamine oxidase inhibitor, MAOI. · · Noun Definition 1 Synonyms · · · monoamine oxidase inhibitor · · Synonym 1 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 m latin small letter m U+006D o latin small letter o U+006F