red pepper

WordReference Random House Learner's Dictionary of American English © 2025

ˈred ˈpep•per, n. 

1. [uncountable] a spicy powder that is added to food, made from a pepper plant.
2. Plant Biology [countable] a pepper grown in many varieties, the yellow or red pods of which are used for flavoring, sauces, etc.
3. Plant Biology [countable] the mild, ripe fruit of the sweet pepper, which is used as a vegetable.

WordReference Random House Unabridged Dictionary of American English © 2025

red′ pep′per, 

1. cayenne.
2. Plant Biology a pepper, Capsicum annuum longum, cultivated in many varieties, the yellow or red pods of which are used for flavoring, sauces, etc.
3. Plant Biology the mild, ripe fruit of the sweet pepper, Capsicum annuum grossum, used as a vegetable.
• 1585–95

Collins Concise English Dictionary © HarperCollins Publishers::

red pepper noun

1. any of several varieties of the pepper plant, Capsicum frutescens, cultivated for their hot pungent red podlike fruits
2. the fruit of any of these plants
3. the ripe red fruit of the sweet pepper
4. another name for cayenne pepper