noun

1. a small quantity of liquid that is somewhat spherical, as when falling
2. a very small quantity of liquid
3. liquid medicine taken or applied in drops
4. a very small quantity of anything
5. a thing like a drop in shape or size, as a pendent earring or a small piece of candy
6. the act or fact of dropping; a fall, descent, slump, or decrease a drop in prices
7. the dropping of troops or supplies by parachute; airdrop
8. anything that drops or is used for dropping or covering something, as a drop curtain or piece of theater scenery, a drop hammer, or a trapdoor
9. a receptacle or slot into which something is dropped
10. the distance between a higher and lower level; distance through which anything falls or sinks
11. ☆ Slang
    1. a clandestine place or person that is used for depositing or holding messages, something stolen or illegal, etc.
    2. a deposit made in such a place or with such a person

Etymology: ME drope < OE dropa, akin to ON drūpa, droop, Ger triefen: for IE base see drip

intransitive verb dropped, dropping drop′·ping

1. to fall in drops
2. to fall; come down
3. to fall exhausted, wounded, or dead
4. to pass into a specified state, esp. into a less active or less desirable one to drop off to sleep
5. to come to an end or to nothing to let a matter drop
6. to become lower or less, as temperatures, prices, etc.
7. to move down with a current of water or air

transitive verb

1. to let or make fall; release hold of
2. to give birth to: said of animals
3. to utter (a suggestion, hint, etc.) casually
4. to send (a letter)
5. to cause to fall, as by wounding, killing, or hitting
6. 1. to stop, end, or have done with
   2. to dismiss
7. to make lower or less; lower or lessen
8. to make (the voice) less loud
9. to drop (troops or supplies) by parachute; airdrop
10. 1. to omit (a letter or sound) in a word
    2. to cut out; remove; omit she dropped a chapter when she rewrote the book
11. Informal to leave (a person or thing) at a specified place: often with off
12. Slang
    1. to lose (money or a game)
    2. to spend (money)
13. Slang to take (a hallucinogenic drug, barbiturate, etc.) orally