Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
about-face is a noun and verb meaning "act of pivoting 180 degrees, especially in a military formation". It carries 4 recorded senses.
act of pivoting 180 degrees, especially in a military formation
a major change in attitude or principle or point of view
“an about-face on foreign policy”
Definitions, synonyms and semantic relations for about-face come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.