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a drop, unit of measure of volume

a drop (or droplet) of liquid, such as raindrops causing a rainbow, or forming clouds or fog

a drop or dropout in telecommunications, such as in losing a signal, or as in a wire dropped-down from a ceiling

dropping out, drop out, quitting, not terminating a course, school or education

a dropoff or drop-off, like a cliff or ledge, as in a "steep drop"; or a drop-off and pick-up point for passengers or freight

to have the drop on someone is to be in a hidden position, prepared to ambush or otherwise sneak attack that person

abbreviation for dead drop, used in espionage to exchange messages covertly between spies.

a falling or decrease, such as the temperature or the price of a commodity going down quickly

a drop, or a length-to-weight relation for baseball bats. It is the length in inches minus the weight in ounces. For instance, if a bat is 32 inches long, and weighs 29 ounces, it would be a "drop three," or "minus three".

Item drop, a videogaming term

A solid candy or medicine, such as:

A lemon drop

A throat lozenge or cough drop

a Dutch sweet liquorice called drop

a drop noseband is a type of noseband used on the bridle of a horse

a section in electronic music where the music will crescendo to a climax, pause briefly (the drop), then resume. See: break (music)

in casinos, the currency removed from casino games, most notably tables and slot machines, or the process of collecting such currency to be counted

in breakdancing, a drop is a move to transition from toprock to downrock.

in On-premises wiring, a drop is a network run from a concentration of communication devices to a wall box or other termination.

Drop, an album by the Shamen