1.Verbbegin to be; turn into . .mw-parser-output .defdate{font-size:smaller}
"She became a doctor when she was 25.; The weather will become cold after the sun goes down.; The sense ‘state or process of bearing fruit’ has become imposed on fruition as the 20c. proceeded."
2.VerbTo come about; happen; come into being; arise.
"What became of him after he was let go?; It hath becomen so that many a man had to sterve."
3.VerbTo be appropriate for.
"It doesn’t become a true gentleman to speak in such a manner."
4.VerbOf an adornment, piece of clothing etc.: to look attractive on (someone).