The verb become has 4 senses (first 3 from tagged texts)
1. (333) become, go, get -- (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!")
2. (222) become, turn -- (undergo a change or development; "The water turned into ice"; "Her former friend became her worst enemy"; "He turned traitor")
3. (5) become -- (come into existence; "What becomes has duration")