The word "contain" can be used in several contexts, each with its own meaning:
1. To hold or keep within boundaries or limits:
"The jar contains 500 milliliters of water."
"The library contains thousands of books."
2. To have or include something as a part or element:
"The recipe contains flour, sugar, and eggs."
"The company contains several different departments."
3. To prevent something from coming out or spreading:
"The sealant contains the leak."
"The medicine is designed to contain the virus."
4. To have the capacity to hold a specified amount or number:
"The container contains 20 liters of liquid."
"The room contains up to 100 people."
5. In biology, to have within its boundaries or structure:
"The cell contains the DNA that carries the genetic information."
6. In philosophy and logic, to include as a part of a whole:
"Democracy contains the principle of equality."
The specific meaning of "contain" will depend on the context in which it is used.
