1. (n.) The act or process of increasing; growth in bulk, quantity, number, value, or amount; augmentation; enlargement.

2. (n.) Matter added; increase; produce; production; -- opposed to decrement.

3. (n.) The increase of a variable quantity or fraction from its present value to its next ascending value; the finite quantity, generally variable, by which a variable quantity is increased.

4. (n.) An amplification without strict climax,

access accession accessory accompaniment accretion accrual accruement accumulation addenda addendum additament addition additive additory additum adjunct adjuvant advance aggrandizement amplification annex annexation appanage appendage appendant appreciation appurtenance appurtenant ascent attachment augment augmentation ballooning bloating boom boost broadening buildup coda complement concomitant continuation corollary crescendo development edema elevation enlargement expansion extension extrapolation fixture flood gain greatening growth gush hike increase inflation jump leap mounting multiplication offshoot pendant productiveness proliferation raise reinforcement rise side effect side issue snowballing spread supplement surge swelling tailpiece tumescence undergirding up upping upsurge upswing uptrend upturn waxing widening