enter or assume a certain state or condition; "He became annoyed when he heard the bad news"; "It must be getting more serious"; "her face went red with anger"; "She went into ecstasy"; "Get going!"
undergo a change or development; "The water turned into ice"; "Her former friend became her worst enemy"; "He turned traitor"
come into existence; "What becomes has duration"
enhance the appearance of; "Mourning becomes Electra"; "This behavior doesn't suit you!"