Difference between Grapefruit and Lemon

Grapefruit

Part of speech: noun

Definition: The tree of the species Citrus paradisi. The large spherical tart fruit produced by this tree.

Lemon

Part of speech: adjective

Definition: Containing or having the flavour/flavor and/or scent of lemons.Of the pale yellow colour/color of lemons.

Part of speech: noun

Definition: A yellowish citrus fruit.A semitropical evergreen tree that bears such fruits.A taste or flavour/flavor of lemons.A more or less bright shade of yellow associated with lemon fruits.A defective or inadequate item.favour, favor.A piece of fanfiction involving explicit sex.