This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

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

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

v. To put to good use; use profitably.

verb-intransitive. To become better.

verb-intransitive. To make beneficial additions or changes: improve on the translation.

v. to make (something) better; to increase the value or productivity (of something)

v. to become better

v. To disprove or make void; to refute.

v. To disapprove; to find fault with; to reprove; to censure.

v. To make better; to increase the value or good qualities of; to ameliorate by care or cultivation.

v. To use or employ to good purpose; to make productive; to turn to profitable account; to utilize

v. To advance or increase by use; to augment or add to; -- said with reference to what is bad.

verb-intransitive. To grow better; to advance or make progress in what is desirable; to make or show improvement.

verb-intransitive. To advance or progress in bad qualities; to grow worse.

verb-intransitive. To increase; to be enhanced; to rise in value.

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.

To grow better in any way; become more excellent or more favorable; advance in goodness, knowledge, wisdom, amount, value, etc.: as, his health is improving; the price of cotton improves daily.

To increase; grow.

To approve; prove; test.

To disapprove; censure; blame.

To disprove; prove false; refute.

v. get better

v. to make better

"Seeing the living standards of the Chinese people improve is a good thing -- good because we want a stable China, and good because China can be a powerful market for American exports."

to improve upon   

decline    deteriorate    impair    spoil   

improved    improves    improving   

improving-furnace    to improve on   

improvement   

refute    disapprove    reprove    censure    ameliorate    reform    correct    better    mend    rectify   

approve    behoove    disapprove    disprove    groove    move    prove    remove    veuve   

non-ferrous    gummi    piecing    naow    judge    falshood    pin-prick    self-carewe    beachhead    storm-beaten