Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
professionalise is a verb meaning "become professional or proceed in a professional manner or in an activity for pay or as a means of livelihood". It carries 2 recorded senses.
become professional or proceed in a professional manner or in an activity for pay or as a means of livelihood
make professional or give a professional character to
“Philosophy has not always been professionalized and used to be a subject pursued only by amateurs”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for professionalise come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.