adjustment

(noun) making or becoming suitable; adjusting to circumstances. Synonyms: accommodation, fitting.

(noun) the act of making something different (as e.g. the size of a garment). Synonyms: alteration, modification.

(noun) the act of adjusting something to match a standard. Synonyms: registration, readjustment.

(noun) the process of adapting to something (such as environmental conditions). Synonyms: adaptation, adaption.

(noun) an amount added or deducted on the basis of qualifying circumstances. Synonyms: allowance. Example: "An allowance for profit."