Real Dictionary

adjust
verb: If you adjust something such as your clothing or a machine, you correct or alter its position or setting.
verb: If you adjust something, you change it so that it is more effective or appropriate.
verb: If you adjust your vision or if your vision adjusts, the muscles of your eye or the pupils alter to cope with changes in light or distance.
verb: When you adjust to a new situation, you get used to it by changing your behaviour or your ideas.

adjust in Accounting
verb: If you adjust the amount of a transaction or account, you change it.

adjust in American English
to change so as to fit, conform, make suitable, etc.
intransitive verb: to adapt oneself; become adapted
transitive verb: to change (something) so that it fits, corresponds, or conforms; adapt; accommodate

adjust in British English
verb: to alter slightly, esp to achieve accuracy; regulate

adjust in Insurance
verb: If you adjust a claim, you decide the amount that needs to be paid in order to settle it.