One of the five digits of the hand, especially one other than the thumb. The part of a glove designed to cover a finger. Something, such as an oblong peninsula, that resembles one of the digits of the hand. The length or width of a finger. A degree of participation; a share: "seems almost sure to have a finger or two in crafting the final blueprint\u201d ( George B. Merry). An obscene gesture of defiance or derision made by pointing or jabbing the middle finger upward. Often used with the. To touch with the fingers; handle. See Synonyms at touch. Music To mark (a score) with indications of which fingers are to play the notes. Music To play (an instrument) by using the fingers in a particular order or way. Slang To inform on. Slang To designate, especially as an intended victim. To handle something with the fingers. Music To use the fingers in playing an instrument. have To hope for a successful or advantageous outcome. lay (one's) To locate; find: We haven't been able to lay a finger on those photos. put (one's) finger on To remember; recall: I know his name; I just can't put my finger on it. twist To dominate utterly and effortlessly.