值域 Traditional form: 值域 Pinyin (reading): zhíyù Definitions: image (or range) of a function (math.) Characters: 值 - price, value, worth 域 - area, district, field, land, region; boundary; domain (in taxonomy) Traditional characters: 值 - price, value, worth 域 - area, district, field, land, region; boundary; domain (in taxonomy)