The verb overcome has 4 senses (first 3 from tagged texts)
1. (14) get the better of, overcome, defeat -- (win a victory over; "You must overcome all difficulties"; "defeat your enemies"; "He overcame his shyness"; "She conquered here fear of mice"; "He overcame his infirmity"; "Her anger got the better of her and she blew up")
2. (10) overcome, get over, subdue, surmount, master -- (get on top of; deal with successfully; "He overcame his shyness")
3. (8) overwhelm, overpower, sweep over, whelm, overcome, overtake -- (overcome, as with emotions or perceptual stimuli)
4. get the best, have the best, overcome -- (overcome, usually through no fault or weakness of the person that is overcome; "Heart disease can get the best of us")