pineapple

1. A tropical plant, Ananas comosus, native to South America, having thirty or more long, spined and pointed leaves surrounding a thick stem. (countable, uncountable)
2. The ovoid fruit of the pineapple plant, which has very sweet white or yellow flesh, a tough, spiky shell and a tough, fibrous core. (countable, uncountable)
3. The flesh of a pineapple fruit used as a food item. (uncountable)
4. An Australian fifty dollar note. (countable, slang, uncountable)
5. A web burrfish (Chilomycterus antillarum, syn. Chilomycterus geometricus) (countable, uncountable)
6. A light yellow colour, like that of pineapple flesh (also called pineapple yellow). (countable, uncountable)
7. A hand grenade. (From the similarity to the shape of a pineapple fruit.) (countable, slang, uncountable)
8. A hairstyle consisting of a ponytail worn on top of the head, imitating the leaves of a pineapple. (countable, uncountable)

Plural pineapples