intransitive verb

To raise to a more desirable or more excellent quality or condition; make better.

intransitive verb

To increase the productivity or value of (land or property).

intransitive verb

To become better.

intransitive verb

To make beneficial additions or changes.

To disapprove; censure; blame.

To approve; prove; test.

To disprove; prove false; refute.

To make better; ameliorate the condition of; increase in value, excellence, capability, estimation, or the like; bring into a better, higher, more desirable, or more profitable state: as, to improve the mind by study; to improve the breeds of animals; to improve land by careful tillage.

To turn to advantage or account; use profitably; make use of: as, to improve an opportunity; to improve the occasion.

To increase in force or amount; intensify in any respect.