1. The boreal forest sequesters more carbon than any other terrestrial ecosystem.

2. He sequesters himself in a small working office, sleeves rolled up, tie off, reading mail, making overseas calls.

3. Claustral: Of or relating to a method of establishing a new colony, found in certain social insects, in which a queen (in ants) or a queen and king pair (in termites) sequesters itself in a small chamber and hatches the first generation of workers, nourishing them primarily on stored body fat.