Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
aide-de-camp is a noun meaning "an officer who acts as military assistant to a more senior officer". It carries one recorded sense.
an officer who acts as military assistant to a more senior officer
military
Definitions, synonyms and semantic relations for aide-de-camp come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.