ETYM Old Eng. barrere, barere, French barričre, from barre bar. Related to Bar.
1. A structure or object that impedes free movement.
2. Any condition that makes it difficult to make progress or to achieve an objective; SYN. roadblock.
3. Anything serving to maintain separation by obstructing vision or access.

The upper or lower limit in a permitted range of values.

(Homonym: gait).
1. A circuit with several inputs but only one output that can be activated by particular combinations of inputs.
2. A door-like movable barrier in a fence or wall.
3. Total admission receipts at a sports event.

The upper or lower limit in a permitted range of values.