1. (n.) The act of adding two or more things together; -- opposed to subtraction or diminution.

2. (n.) Anything added; increase; augmentation; as, a piazza is an addition to a building.

3. (n.) That part of arithmetic which treats of adding numbers.

4. (n.) A dot at the right side of a note as an indication that its sound is to be lengthened one half.

5. (n.) A title annexed to a man's name, to identify him more precisely; as, John Doe, Esq.; Richard Roe, Gent.; Robert Dale, Mason; Thomas Way, of New York; a mark of distinction; a title.

6. (n.) Something added to a coat of arms, as a mark of honor; -- opposed to abatement.

Anschluss L access accession accessory accident accidental accompaniment accord accretion accrual accruement accumulation acquirement acquisition addenda addendum adding additament additionally additive additory additum adjunct adjuvant advance affairs affiliation affinity agglomeration aggrandizement aggregation agreement alliance also amalgamation ampliation amplification annex annexation appanage appendage appendant appendix appreciation approximation appurtenance appurtenant as well as well as ascent assemblage assimilation association attachment attainment augment augmentation auxiliary ballooning besides beyond blend blending bloating bond boom boost broadening buildup cabal cartel centralization closeness coalescence coalition coda collateral combination combine combining combo coming by complement composition concomitant confederacy confederation congeries conglomeration conjugation conjunction connectedness connection consolidation conspiracy contiguity contingency contingent continuation contrariety corollary crescendo dealings deduction deployment development differentiation disjunction dispersion division dragging down earnings ecumenism edema elevation ell embodiment encompassment enlargement enosis equation evolution expansion extension extra extrapolation fanning out federalization federation filiation fixture flare flood furthermore fusion gain gaining getting getting hold of greatening growth gush happenstance hike hiking homology hookup in addition in addition to incidental inclusion incorporation increase increment inessential inflation integration intercourse interpolation intimacy into the bargain inversion involution joining jump junction junta league leap liaison link linkage linking magnification making marriage meld melding mere chance merger moneygetting moneygrubbing moneymaking moreover mounting multiplication mutual attraction nearness nonessential not-self notation obtainment obtention offshoot other over and above package package deal pendant practice procural procurance procuration procurement productiveness proliferation propinquity proportion proximity putting together raise raising rapport reckoning reduction reinforcement relatedness relation relations relationship rider rise secondary securement side effect side issue similarity snowballing solidification splay spread spreading subsidiary subtraction summation summing-up superaddition supplement surge swelling sympathy syncretism syndication syneresis synthesis tailpiece tie tie-in tie-up to boot too transformation trover