1 turn or change or transform into:
The princess kissed the prince, who immediately became a frog.
2 grow or develop or evolve into; mature or ripen into:
It's hard to believe that this dull caterpillar will eventually become a splendid butterfly.
3 enhance, suit, fit, befit, be proper or appropriate for, behove or US behoove:
Moonlight becomes you, It goes with your hair.
4 grace, adorn:
Walter was a man who became the dignity of his function as a commissionaire.
5 become of. come of, happen to:
What will become of you if you don't go to school?