Any fruit of a plant of the botanical genus Capsicum, which has a spicy/burning flavour because it contains capsaicin. (Not all chili peppers are particularly spicy, but all true chili peppers contain some capsaicin, in contrast to e.g. the bell pepper, which is not a true chili pepper and does not.)
A red sweet pepper, a cultivar of Capsicum annuum, used to make relish, stuffed into olives, or used as spice.
A tropical berry used to make allspice.
The tree on which it grows.