1. [ noun ] a component that is added to something to improve it
Synonyms: add-on improver

"the addition of a bathroom was a major improvement" "the addition of cinammon improved the flavor"

Related terms: component additive attachment afterthought elongation softener annex better
2. [ noun ] 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"

Related terms: subtraction increase fluoridation retrofit add
3. [ noun ] something added to what you have already
Synonyms: accession

"the librarian shelved the new accessions" "he was a new addition to the staff"

Related terms: acquisition
4. [ noun ] a quantity that is added
Synonyms: increase gain

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

Related terms: indefinite_quantity accretion increase
5. [ noun ] (housing,geography) a suburban area laid out in streets and lots for a future residential area
Related terms: suburb
6. [ noun ] (mathematics) the arithmetic operation of summing; calculating the sum of two or more numbers
Synonyms: plus summation

"the summation of four and three gives seven" "four plus three equals seven"

Related terms: arithmetic_operation total
Similar spelling:   additional