1. General Definition:

A capsule is a small container, usually cylindrical or oval, used to enclose something.

2. In Medicine/Pharmacy:

A capsule is a small, soluble container (usually made of gelatin) that encloses a dose of medication. It dissolves in the stomach or intestines to release the contents.

• Example: "Take one capsule twice a day with water."

3. In Science:

In biology, a capsule may refer to:

• A protective outer layer found in some bacteria.

• A membranous structure enclosing an organ or joint (e.g., renal capsule, joint capsule).

4. In Technology:

A capsule may refer to:

• A space capsule: the part of a spacecraft that holds astronauts or equipment.

• A software capsule: a compact, self-contained program or file.

5. In Fashion:

A capsule wardrobe is a small, curated collection of essential clothing items that can be mixed and matched easily.

6. In Education (Course Capsule):

Sometimes, "capsule" refers to a brief summary of a course, module, or topic — essentially a condensed version of a larger concept.