noun:

1. A move in many different styles of partner dances, often performed at the end of a dance, in which the follower leans far to the side and is supported by the leader.
2. A diplomat.
3. The action of dipping or plunging for a moment into a liquid.
4. In the turpentine industry, the viscid exudation that is dipped out from incisions in the trees. Virgin dip is the runnings of the first year, yellow dip the runnings of subsequent years.
5. A tank or trough where cattle or sheep are immersed in chemicals to kill parasites.
6. A pickpocket.
7. A lower section of a road or geological feature.
8. A dip stick.
9. A swim, usually a short swim to refresh.
10. A gymnastic exercise on the parallel bars in which the performer, resting on his hands, lets his arms bend and his body sink until his chin is level with the bars, and then raises himself by straightening his arms.
11. Acronym of dual in-line package.
12. A sauce for dipping.
13. The angle from horizontal of a planar geologic surface, such as a fault line.
14. A sudden drop followed by a climb, usually to avoid obstacles or as the result of getting into an airhole.
15. Initialism of device-independent pixel.
16. Inclination downward; direction below a horizontal line; slope; pitch.
17. The moist form of snuff tobacco.
18. A foolish person.
19. Acronym of dependency inversion principle.
20. A dipped candle.
21. The act of missing out on seeing a sought after bird.

verb:

1. To consume snuff by placing a pinch behind the lip or under the tongue so that the active chemical constituents of the snuff may be absorbed into the system for their narcotic effect.
2. To plunge or engage thoroughly in any affair.
3. To leave.
4. To lower a light's beam.
5. To lower into a liquid.
6. To take out, by dipping a dipper, ladle, or other receptacle, into a fluid and removing a part; often with out.
7. To lower the body by bending the knees while keeping the body in an upright position, as in movement to the rhythm of music.
8. To treat cattle or sheep by immersion in chemical solution.
9. (of a value or rate) To decrease slightly.
10. To lower (a flag), particularly a national ensign, to a partially hoisted position in order to render or to return a salute. While lowered, the flag is said to be “at the dip." A flag being carried on a staff may be dipped by leaning it forward at an approximate angle of 45 degrees.
11. To miss out on seeing a sought after bird.
12. To perform a dip dance move (often phrased with the leader as the subject noun and the follower as the subject noun being dipped).
13. To incline downward from the plane of the horizon.
14. To perform the action of plunging a dipper, ladle. etc. into a liquid or soft substance and removing a part.
15. To wet, as if by immersing; to moisten.
16. To use a dip stick to check oil level in an engine.
17. To immerse oneself; to become plunged in a liquid; to sink.
18. To engage as a pledge; to mortgage.
19. To immerse for baptism.
20. To perform (a bow or curtsey) by inclining the body.