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to (happen to) see; to notice; to catch sight of
昨日駅の前で田中さんを見かけた。
I saw Mr. Tanaka in front of the station yesterday.
最近あの店で彼をよく見かけるようになった。
Recently I've started to often see him at that shop.
散歩中に珍しい野鳥を見かけて写真を撮った。
I spotted a rare wild bird during my walk and took a photo.