A closed set in a topological space is one whose complement is open and therefore contains all its limit points.

Despite inheriting a large estate, their father remained close-fisted and refused to help his children financially.

The houses were close together on the narrow street, giving the neighborhood a cozy feel.

In many urban battles, soldiers must be prepared to fight at close ranges.

The marksman had to fire from close range to hit the small target hidden behind debris.

The negotiators finalized the agreement with closed doors to avoid media scrutiny.

Their close order drill impressed the visiting general.

When solving the inequality, consider the union of closed intervals to include both endpoints.

The documentary's close-ups revealed details we never noticed before.

In our simulations, closed systems often reach equilibrium faster than open ones.