The researchers were denied access to the closed city, where entry and residency are tightly controlled.

In algebraic topology, a closed curve in a space often represents an element of the fundamental group when considered up to homotopy.

In first-order logic, proving that a closed formula is valid requires showing that it is true under every interpretation.

After the mine shut down, the once-bustling closed town fell silent except for the wind.

Please send me the closed files before the meeting so I can review them.

He rerouted his knight to exploit the closed file and increase pressure on Black's queenside.

For safety reasons, employees must wear closed-toe shoes in the workshop.

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

I felt a strange nostalgia as I walked past the closed shops on the corner, their windows filled with faded posters.

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