Real Dictionary

gourd
countable noun: A gourd is a container made from the hard dry skin of a gourd fruit. Gourds are often used to carry water or for decoration.
countable noun: A gourd is a large round fruit with a hard skin. You can also use gourd to refer to the plant on which this fruit grows.

gourd in American English
any trailing or climbing plant belonging to the gourd family
designating a family (Cucurbitaceae, order Violales) of dicotyledonous plants, including the squash, melon, cucumber, and pumpkin
noun: the hard-shelled fruit of any of various plants, esp. those of Lagenaria siceraria (white-flowered gourd or bottle gourd), whose dried shell is used for bowls and other utensils, and Cucurbita pepo (yellow-flowered gourd), used ornamentally

gourd in British English
noun: the fruit of any of various cucurbitaceous or similar plants, esp the bottle gourd and some squashes, whose dried shells are used for ornament, drinking cups, etc