A sunflower is a very tall plant with large yellow flowers. Oil from sunflower seeds is used in cooking and to make margarine.
sunflower in British English
(ˈsʌnˌflaʊə)
noun
1.
any of several American plants of the genus Helianthus, esp H. annuus, having very tall thick stems, large flower heads with yellow rays, and seeds used as food, esp for poultry: family Asteraceae (composites)
See also Jerusalem artichoke
2. sunflower seed oil
sunflower in American English
(ˈsʌnˌflaʊər)
noun
any of a genus (Helianthus) of tall plants of the composite family, having large, yellow, daisylike flowerswith yellow, brown, purple, or almost black disks containing edible seeds that yield an oil