phase-out phase out • phase-rotation relay · · · Info · Definitions · Antonyms · Characters · · phase-out · · Text Common · · Latin · · Scripts 9 · · Length 3 · · Syllables Definitions · · · (noun) the act or instance of a planned discontinuation. · · Noun Definition 1 (verb) terminate gradually. Synonyms: phase out. · · Verb Definition 1 Antonyms · · · phase in · · Antonym 0 Characters · · - hyphen-minus U+002D a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075