Read the dictionary definition of addition. All definitions for this word.
1. the act of adding one thing to another
1. the addition of flowers created a pleasing effect
2. the addition of a leap day every four years
2. the arithmetic operation of summing; calculating the sum of two or more numbers
1. the summation of four and three gives seven
2. four plus three equals seven
3. a component that is added to something to improve it
1. the addition of a bathroom was a major improvement
2. the addition of cinnamon improved the flavor
4. a suburban area laid out in streets and lots for a future residential area
5. something added to what you already have
1. the librarian shelved the new accessions
2. he was a new addition to the staff
6. a quantity that is added
1. there was an addition to property taxes this year
2. they recorded the cattle's gain in weight over a period of weeks
