Definitions of capsule:

noun: a pill in the form of a small rounded gelatinous container with medicine inside
noun: a small container
noun: a structure that encloses a body part
noun: a dry dehiscent seed vessel or the spore-containing structure of e.g. mosses
noun: a spacecraft designed to transport people and support human life in outer space
noun: a pilot's seat in an airplane that can be forcibly ejected in the case of an emergency; then the pilot descends by parachute
noun: a shortened version of a written work
verb: enclose in a capsule
verb: put in a short or concise form; reduce in volume