Definition of Group Word for Project 4

Our group word is "addition."
It means:
–noun

1.

the act or process of adding or uniting.

2.

the process of uniting two or more numbers into one sum,represented by the symbol +.

3.

the result of adding.

4.

something added.

5.

a wing, room, etc., added to a building, or abutting landadded to real estate already owned.