groove

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A long narrow furrow or channel.
2. n. The spiral track cut into a phonograph record for the stylus to follow.
3. n. Slang A settled routine: got into the groove of a nine-to-five job.
4. n. Slang A situation or an activity that one enjoys or to which one is especially well suited: found his groove playing bass in a trio.
5. n. Slang A very pleasurable experience.
6. v. To cut a groove or grooves in.
7. v. Baseball To throw (a pitch) over the middle of home plate, where it is likely to be hit.
8. v. To take great pleasure or satisfaction; enjoy oneself: just sitting around, grooving on the music.
9. v. To be affected with pleasurable excitement.
10. v. Slang To react or interact harmoniously.
11. idiom. in the groove Slang Performing exceptionally well.

Century Dictionary and Cyclopedia

1. n. A pit or hole in the ground; specifically, in mining, a shaft or pit sunk into the earth.
2. n. A furrow or long hollow, such as is cut by a tool; a rut or furrow, such as is formed in the ground or in a rock by the action of water; a channel, usually an elongated narrow channel, formed by any agency.
3. n. Specifically A long and regular incision cut by a tool, or a narrow channel formed in any way (as in a part of a construction), for something (as another part) to fit into or move in.
4. n. Especially— The sunken or plowed channel on the edge of a matched board, to receive the tongue.
5. n. The spiral rifling of a gun.
6. n. In the wind-chest of an organ, one of the channels or passages into which the wind in admitted by the pallets, and with which the pipes belonging to a given key are directly or indirectly connected. When a given key is struck, its pallet is opened, and the groove filled with compressed air. Whether all the pipes connected with the groove are sounded or not depends on how many stops are drawn. Also grove.
7. n. In anatomy and zoology, a natural furrow or longitudinal hollow or impression, especially one which is destined to receive one of the organs in repose: as, the antennal groove; the rostral groove in the Rhynchophora, etc.
8. n. Figuratively, a fixed routine; a narrow, unchanging course; a rut: as, life is apt to run in a groove; a groove of thought or of action.
9. To cut or make a groove or channel in; furrow.
10. To form as or fix in a groove; make by cutting a groove or grooves.

Wiktionary

1. n. A long, narrow channel or depression; e.g., such a slot cut into a hard material to provide a location for an engineering component, a tyre groove, or a geological channel or depression.
2. n. A fixed routine
3. n. The middle of the strike zone in baseball where a pitch is most easily hit
4. n. A pronounced, enjoyable rhythm
5. v. To cut a groove or channel in; to form into channels or grooves; to furrow.
6. v. To create, dance to, or enjoy rhythmic music.

GNU Webster's 1913

1. n. A furrow, channel, or long hollow, such as may be formed by cutting, molding, grinding, the wearing force of flowing water, or constant travel; a depressed way; a worn path; a rut.
2. n. Hence: The habitual course of life, work, or affairs; fixed routine.
3. n. (Mining), Prov. Eng. A shaft or excavation.
4. v. To cut a groove or channel in; to form into channels or grooves; to furrow.

WordNet 3.0

1. n. (anatomy) any furrow or channel on a bodily structure or part
2. v. hollow out in the form of furrow or groove
3. n. a long narrow furrow cut either by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record)
4. v. make a groove in, or provide with a groove
5. n. a settled and monotonous routine that is hard to escape