addition

ad·di·tion

noun \ə-ˈdi-shən, a-\

Definition of ADDITION

1

: a part added (as to a building or residential section)

2

: the result of adding : increase

3

: the act or process of adding; especially : the operation of combining numbers so as to obtain an equivalent simple quantity

4

: direct chemical combination of substances into a single product

— in addition

: ²besides, also

— in addition to

: combined or associated with : ¹besides 2

Examples of ADDITION

1. The children learned addition and subtraction.
2. The museum's collection includes several new additions.

Origin of ADDITION

addicion Anglo-French, from Latin addition-, additio, from addere

First Known Use: 14th century

Related to ADDITION

Synonyms

annex, extension, penthouse

Antonyms

abatement, decline, decrease, decrement, depletion, diminishment, diminution, drop-off, fall, falloff, lessening, loss, lowering, reduction, shrinkage, step-down

Related Words

arm, ell, wing

Near Antonyms

deduction, subtraction

Other Building Terms

batten, cistern, hearth, lath, transom, wainscot

Rhymes with ADDITION

admission, ambition, attrition, audition, beautician, clinician, cognition, coition, commission, condition, contrition, demission, dentition, dismission, Domitian, edition, emission, ethician, fruition, ignition, Kittitian, lenition, logician, magician, Mauritian, monition, mortician, munition, musician, nutrition, omission, optician, partition, patrician, perdition, permission, petition, Phoenician, physician, Politian, position, punition, remission, rendition, sedition, submission, suspicion, tactician, technician, tradition, transition, transmission, tuition, volition