watermelon Meaning, Definition & Usage

  1. noun an African melon
    watermelon vine; Citrullus vulgaris.
  2. noun large oblong or roundish melon with a hard green rind and sweet watery red or occasionally yellowish pulp

WordNet

Wa"ter*mel`on noun
Definitions
  1. (Bot.) The very large ovoid or roundish fruit of a cucurbitaceous plant (Citrullus vulgaris) of many varieties; also, the plant itself. The fruit sometimes weighs many pounds; its pulp is usually pink in color, and full of a sweet watery juice. It is a native of tropical Africa, but is now cultivated in many countries. See Illust. of Melon.

Webster 1913