Definition of “capsule”

noun

1. a soluble case of gelatine enclosing a dose of medicine
2. a thin metal cap, seal, or cover, such as the foil covering the cork of a wine bottle
3. botany 
   1. a dry fruit that liberates its seeds by splitting, as in the violet, or through pores, as in the poppy
   2. the spore-producing organ of mosses and liverworts
4. bacteriology a gelatinous layer of polysaccharide or protein surrounding the cell wall of some bacteria: thought to be responsible for the virulence in pathogens
5. anatomy 
   1. a cartilaginous, fibrous, or membranous envelope surrounding any of certain organs or parts
   2. a broad band of white fibres (internal capsule) near the thalamus in each cerebral hemisphere
6. See space capsule
7. an aeroplane cockpit that can be ejected in a flight emergency, complete with crew, instruments, etc
8. (modifier) in a highly concise form  ⇒ a capsule summary 
9. (modifier) (in the fashion industry) consisting of a few important representative items  ⇒ a capsule collection