To join or unite (e.g. one thing to another, or as several particulars) so as to increase the number, augment the quantity, or enlarge the magnitude, or so as to form into one aggregate.
To append (e.g. a statement); to say further information; to add on.
To summon minions or reinforcements.
To combine elements of (something) into one quantity.
To give by way of increased possession (to someone); to bestow (on).
To make an addition; to augment; to increase; to add on.
To sum up; to put together mentally; to add up.
To perform the arithmetical operation of addition.
The addition of a song to a station's playlist.
An act or instance of adding.
An additional enemy that joins a fight after the primary target.
To occur together.