What does adjustment mean?
The definition of adjustment
Ad*just”ment, n.
Etym: [Cf. F. ajustement. See Adjust.]

1 The act of adjusting, or condition of being adjusted; act of bringing into proper relations; regulation. Success depends on the nicest and minutest adjustment of the parts concerned. Paley.
2 (Law)
Settlement of claims; an equitable arrangement of conflicting claims, as in set-off, contribution, exoneration, subrogation, and marshaling. Bispham.
3 The operation of bringing all the parts of an instrument, as a microscope or telescope, into their proper relative position for use; the condition of being thus adjusted; as, to get a good adjustment; to be in or out of adjustment.

Synonyms
— Suiting; fitting; arrangement; regulation; settlement; adaptation; disposition.