noun

• (also figuratively) A small quantity of liquid, just large enough to hold its own round shape through surface tension, especially one that falls from a source of liquid.
  "Put three drops of oil into the mixture."
• (also figuratively) A small quantity of liquid, just large enough to hold its own round shape through surface tension, especially one that falls from a source of liquid.
  "My first treatment consisted of one eye drop in each eye which was supposed to determine the condition of the eye and make it easier to examine them the next day."
• (also figuratively) A small quantity of liquid, just large enough to hold its own round shape through surface tension, especially one that falls from a source of liquid.
  "ear drops    eye drops"
• (figuratively) A very small quantity of liquid, or (by extension) of anything.
  "My aunt asked for just a drop more tea."

verb

• (intransitive) Of a liquid: to fall in drops or droplets.
  "The kindlye dewe drops from the higher tree, / And wets the little plants that lowly dwell."
• (intransitive, also figuratively) To fall (straight down) under the influence of gravity, like a drop of liquid.
  "A single shot was fired and the bird dropped from the sky."
• (intransitive, also figuratively) To fall (straight down) under the influence of gravity, like a drop of liquid.
  "When you defeat this boss, there's a chance a power-up will drop."
• (intransitive) To fall or sink quickly or suddenly to the ground.
  "Drop and give me thirty push-ups, private!"