Definitions

1. noun

A large, yellow or pink, or sometimes red citrus fruit with a sour taste, often eaten as a breakfast food or used in salads and desserts.

“She started her day with a slice of grapefruit and a glass of juice.”

2. noun

The tree (Citrus paradisi) that produces this fruit.

“The gardener carefully tended to the grapefruit tree in the backyard.”