The provision of seating or tables without reservations.

A straight razor.

plural of open razor

plural of bottle-opener

plural of can opener

plural of tin opener

(topology) Informally, a set such that the target point of a movement by a small amount in any direction from any point in the set is still in the set; exemplified by a full circle without its boundary.

(literally) Total outdoor sunshine, without clouds, haze, or other obstruction. / (figuratively) Openness, transparency, public awareness.

(idiomatic, often business) To reveal confidential information, especially details of one's business operations.

An expanse of an ocean, sea, or large lake which is distant from shore and devoid of nearby islands or other obstructions.