1: one that is picked up: as a: a hitchhiker who is given a ride b: a temporary chance acquaintance c: a player acquired from another team 2: the act or process of picking up: as a: a revival of business activity b:accelerationc: the act or technique of making the acquaintance of a previously unknown person especially for amorous purposes 3: the conversion of mechanical movements into electrical impulses in the reproduction of sound; also: a device (as on a phonograph) for making such conversion 4 a: the reception of sound or an image into a radio or television transmitting apparatus for conversion into electrical signals b: a device (as a microphone or a television camera) for converting sound or the image of a scene into electrical signals 5: a light truck having an enclosed cab and an open body with low sides and tailgate —called also pickup truck 6: a pickup game <playing pickup>
