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. Compare gourd family .

a plant bearing such a fruit.

a dried and excavated gourd shell used as a bottle, dipper, flask, etc.

a gourd-shaped, small-necked bottle or flask. ?

out of or off one's gourd

Slang . out of one's mind; crazy.