pickup

A pickup is defined as a small, open truck used for carrying light loads, or the act of lifting something up, or increasing in speed.

(noun)

The definition of pickup is a group or activity that informally gets together, or a place where people can get their prepared food at a restaurant.

(adjective)

An example of pickup used as an adjective is in the phrase "a pickup game of baseball," which means a game that people decided to play without a formal team, umpire, etc.
An example of pickup used as an adjective is in the phrase "a pickup window," which means the window where people get their prepared food.

See pickup in Webster's New World College Dictionary

noun

the act of picking up, as in fielding a rapidly rolling baseball
the process or power of increasing in speed; acceleration
☆ a small, open truck with low sides, for hauling light loads
in full pickup truck
Informal
1. a casual or informal acquaintance, as one formed with hope of sexual activity
2. a person with whom such an acquaintance is formed
☆ Informal improvement or recovery, as in trade
☆ Informal
1. a stimulant; bracer
2. stimulation
1. in an electric phonograph, a device that produces audio-frequency currents from the vibrations of a needle or stylus moving in a record groove
2. the pivoted arm holding this device
1. the reception of sound or light for conversion into electrical energy in the transmitter
2. the apparatus used for this
3. any place outside a studio where a broadcast originates
4. the electrical system connecting this place to the broadcasting station
a small microphone attached to a vibrating surface, as in an electric guitar

adjective

assembled informally for a single engagement, contest, etc.: a pickup jazz band or baseball team
of a game or job performed or played by those assembled in this way
designating a window at a restaurant where prepared food can be bought by customers in cars

See pickup in American Heritage Dictionary 4

noun

a. The act or process of picking up: the pickup and delivery of farm produce.
b. Sports The act of striking or fielding a ball after it has touched the ground: a good pickup and throw from third base.
c. Capacity for acceleration: a sports car with good pickup.
d. Informal An improvement in condition or activity: a pickup in sales.
e. Slang An arrest by a law enforcement officer.
One that is picked up, especially:
a. Passengers or freight: Taxi drivers expect good tips from airport pickups.
b. Informal A hitchhiker.
c. Slang A stranger with whom casual acquaintance is made, usually in anticipation of sexual relations.
Accounting A balance brought forward.
Previous journalistic copy to which succeeding copy is added.
Music See upbeat.
One that picks up, especially:
a. A pickup truck.
b. The rotary rake on a piece of machinery, such as a harvester, that picks up windrowed hay or straw.
Electronics
a. A device that converts the oscillations of a phonograph needle into electrical impulses for subsequent conversion into sound.
b. The tone arm of a record player.
a. The reception of light or sound waves for conversion to electrical impulses.
b. The apparatus used for such reception.
c. A telecast originating outside a studio.
d. The apparatus for transmitting a broadcast from an outside place to the broadcasting station.