Douglas Harper's Etymology Dictionary
professionalize
1833, from professional (adj.) + -ize. Related: Professionalized; professionalizing.
Wiktionary
professionalize
vb. To make something professional
WordNet
professionalize
v. become professional or proceed in a professional manner or in an activity for pay or as a means of livelihood [syn: professionalise]
make professional or give a professional character to; "Philosophy has not always been professionalized and used to be a subject pursued only by amateurs" [syn: professionalise]
Usage examples of "professionalize".
In fact, by professionalizing public office we made it more likely that office holding would be merely another job, not a patriotic act.