Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
co-optation is a noun meaning "the selection of a new member (usually by a vote of the existing membership)". It carries 2 recorded senses.
the act of appointing summarily (with or without the appointee's consent)
Definitions, synonyms and semantic relations for co-optation come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.