v.1. To choose something or someone from a set of options; select something or someone: We went to the video store and picked out a movie to watch. I picked this fabric out because it was the most colorful.
2. To discern something or someone from the surroundings; distinguish something or someone: From the plane, she was able to pick out her house on the ground. The victim picked his attacker out of the lineup.
3. To play a piece of music tentatively, especially on a guitar or piano: He picked out the song on the guitar, trying to remember the notes. I hummed the tune for her, and she picked it out on the piano.