finger

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One of the five digits of the hand, especially one other than the thumb.
• noun The part of a glove designed to cover a finger.
• noun Something, such as an oblong peninsula, that resembles one of the digits of the hand.
• noun The length or width of a finger.
• noun A degree of participation; a share.
• noun An obscene gesture of defiance or derision made by pointing or jabbing the middle finger upward. Often used with the.
• intransitive verb To touch with the fingers; handle. synonym: touch.
• intransitive verb To mark (a score) with indications of which fingers are to play the notes.
• intransitive verb To play (an instrument) by using the fingers in a particular order or way.
• intransitive verb To identify as responsible for wrongdoing or a crime, especially to the police.
• intransitive verb To identify or designate as being responsible.
• intransitive verb Vulgar Slang To insert one or more fingers into the anus or vagina of (a person) as a means of sexual stimulation.
• intransitive verb To handle something with the fingers.
• intransitive verb Music To use the fingers in playing an instrument.
• idiom (have/keep) To hope for a successful or advantageous outcome.
• idiom (lay (one's)/a) To locate; find.
• idiom (put (one's) finger on) To remember; recall.
• idiom (twist/wrap) To dominate utterly and effortlessly.

from The Century Dictionary.

• To touch with the fingers; handle: as, to finger money.
• To toy or meddle with.
• To touch or take thievishly; pilfer; filch; secure by manipulation with the fingers.
• In music: To play, as an instrument requiring the use of individual fingers.
• To play, as a particular passage involving a choice among different possible modes of execution.
• To do or perform with the fingers, as a delicate piece of work, etc.
• To touch something with the fingers, as a musical instrument in playing it.
• noun In a mechanical piano-player, a lever that strikes or depresses a key. See piano-player.
• noun A projecting pin or rod, straight, or slightly curved; specifically, a projecting curved wire which carries an electric current into the clearance-volume of an internal-combustion motor, so that at the proper time a spark may pass between its tip and another terminal and fire the charge of explosive mixture. See internal-combustion engine, under engine.
• noun In flax manuf., a small lot of fiber that has been treated at one operation in the scutching process.
• noun A digit of the fore limb; any one of the terminal or distal members of the hand; in a restricted sense, any digit of the hand except the innermost or thumb.
• noun Something like or likened to a finger, as a ray of a starfish; something resembling or serving the purpose of a finger; an index.
• noun Specifically— In zoology, one of the two parts forming a chelate or forceps-joint, especially the smaller part, which hinges on the other.
• noun In machinery, any small wood or metal projection on a machine, for parting materials or arresting motion, as the tooth of a rake, the gripper in printing-presses, or the wires of a stop-motion: as, the fingers of a harvester, in and between which the knives play.
• noun A measure of length, a finger-breadth, commonly a natural finger-breadth.
• noun A finger's length, commonly that of the middle finger.
• noun In music, execution, especially on a keyed instrument; method of fingering: as, she has a good finger.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To touch with the fingers; to handle; to meddle with.
• transitive verb To touch lightly; to toy with.
• transitive verb To perform on an instrument of music.
• transitive verb To mark the notes of (a piece of music) so as to guide the fingers in playing.
• transitive verb To take thievishly; to pilfer; to purloin.
• transitive verb To execute, as any delicate work.
• intransitive verb (Mus.) To use the fingers in playing on an instrument.
• noun One of the five terminating members of the hand; a digit; esp., one of the four extremities of the hand, other than the thumb.
• noun (Mech.) Anything that does the work of a finger; as, the pointer of a clock, watch, or other registering machine
• noun The breadth of a finger, or the fourth part of the hand; a measure of nearly an inch; also, the length of finger, a measure in domestic use in the United States, of about four and a half inches or one eighth of a yard.
• noun rare Skill in the use of the fingers, as in playing upon a musical instrument.
• noun the little finger.