boundary

A line that marks the edge of an area or separates two areas.

• A fence marks the boundary of our land.
• The ball rolled beyond the field boundary.
• They disagreed about the boundary between the two farms.

How to use it: boundary between A and B (The river forms the boundary between the two regions.); boundary of something (Trees mark the boundary of the park.)

Similar words: border, limit, edge

Common phrases: boundary line, boundary of something, boundary between something

A limit on what someone accepts, or a dividing line between ideas or parts of life.

• You need to set clear boundaries.
• He crossed a boundary by reading my messages.
• The boundary between work and home has become less clear.

How to use it: boundary between A and B (She keeps a firm boundary between friendship and business.)

Similar words: limit

Common phrases: set a boundary, cross a boundary, boundary between something

A cricket hit that sends the ball to or beyond the field’s edge and scores four or six runs.

• She hit a boundary.
• Two boundaries helped the team win.
• He scored a boundary from the final ball.

Common phrases: hit a boundary, score a boundary