addition

Noun

• 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
    

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

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

• 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
    

• 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
    

• 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
    

Related words

• Synonyms: 
  summation , plus , accession , increase , gain , add-on , improver
• Antonyms: 
  subtraction , deduction