- the act or process of adding or uniting.
- the process of uniting two or more numbers into one sum, represented by the symbol +.
- the result of adding.
- something added.
- a wing, room, etc., added to a building, or abutting land added to real estate already owned.
- Chemistry. a reaction in which two or more substances combine to form another compound.
- in addition to, as well as; besides: In addition to directing the play, she designed most of the scenery.
- the act, process, or result of adding
- a person or thing that is added or acquired
- a mathematical operation in which the sum of two numbers or quantities is calculated. Usually indicated by the symbol +
- mainly US and Canadian a part added to a building or piece of land; annexe
- obsolete a title following a person’s name
- in addition (adverb) also; as well; besides
- in addition to (preposition) besides; as well as
late 14c., “action of adding numbers;” c.1400, “that which is added,” from Old French adition “increase, augmentation” (13c.), from Latin additionem (nominative additio) “an adding to, addition,” noun of action from past participle stem of addere (see add). Phrase in addition to “also” is from 1681.
- The act, process, or operation of adding two or more numbers to compute their sum.
see in addition.