to join or unite (something) to something else so as to increase the quantity, number, size, etc. or change the total effect: to add a wing to the building, to add seasoning to the sauce
to state further
to combine (numbers) into a sum; calculate the total of
intransitive verb
to cause an increase; be an addition (to): this adds to my pleasure
To combine (a column of figures, for example) to form a sum.
To join or unite so as to increase in size, quantity, quality, or scope: added 12 inches to the deck; flowers that added beauty to the dinner table.
To say or write further.
verb, intransitive
To find a sum in arithmetic.
a. To constitute an addition: an exploit that will add to her reputation.
b. To create or make an addition: gradually added to my meager savings.
Phrasal Verb: add up To be reasonable, plausible, or consistent; make sense: The witness's testimony simply did not add up. To amount to an expected total: a bill that didn't add up. To formulate an opinion of: added up the other competitors in one glance.