Dictionary

A small quantity of liquid, just large enough to hold its own round shape via surface tension, especially one that falls from a source of liquid.

Example: Put three drops of oil into the mixture.

A very small quantity of liquid, or (by extension) of anything.

Example: asked for just a drop more tea; she was thirsty and there wasn't a drop of water to be found

(now especially with "the") Alcoholic spirits in general.

Example: It doesn't matter where you're from; anyone who enjoys the drop is a friend of mine.

That which resembles or hangs like a liquid globule: a hanging diamond ornament or earring, a glass pendant on a chandelier, etc.

To fall in droplets (of a liquid).

To drip (a liquid).

Example: The equipment shows how much the glacier has moved and the amount it dropped in height over the summer.

Generally, to fall (straight down).

Example: A single shot was fired and the bird dropped from the sky.

To let fall; to allow to fall (either by releasing hold of, or losing one's grip on).

Example: Don't drop that plate!   The police ordered the men to drop their weapons.