An example of define is when you tell someone what a word means.
An example of define is when you set clear rules for living in your house.
Define your duties.
Reason defines man.
The defining power of an optical instrument.
To define the legal boundaries of a property.
Define the properties of a new drug; a study that defines people according to their median incomes.
Gentle hills that were defined against the sky.
Define the weapons to be used in limited warfare.