Meaning of ADD in English
( v. t. )
To join or unite, as one thing to another, or as several particulars, so as to increase the number, augment the quantity, enlarge the magnitude, or so as to form into one aggregate. Hence: To sum up; to put together mentally; as, to add numbers; to add up a column.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012