· a component that is added to something to improve it; "the addition of a bathroom was a major improvement"; "the addition of cinnamon improved the flavor"

Synonym(s): add-on, improver

Hypernym(s): component, constituent, element

· the act of adding one thing to another; "the addition of flowers created a pleasing effect"; "the addition of a leap day every four years"

Hypernym(s): increase, step-up

Antonym(s): subtraction

· a quantity that is added; "there was an addition to property taxes this year"; "they recorded the cattle's gain in weight over a period of weeks"

Synonym(s): increase, gain

Hypernym(s): indefinite_quantity

· something added to what you already have; "the librarian shelved the new accessions"; "he was a new addition to the staff"

Synonym(s): accession

Hypernym(s): acquisition

· a suburban area laid out in streets and lots for a future residential area

Hypernym(s): suburb, suburbia, suburban_area

· the arithmetic operation of summing; calculating the sum of two or more numbers; "the summation of four and three gives seven"; "four plus three equals seven"

Synonym(s): summation, plus

Hypernym(s): arithmetic_operation