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

(roofing) a method of valley construction in which the steep-slope roofing on both sides are trimmed along each side of the valley, exposing the metal valley flashing.

plural of open razor

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

partially open; ajar / (mathematics) (referring to an interval on the real line) containing only one of its endpoints

A ceremony to mark the official opening of a building or event.

Alternative spelling of bottle opener

plural of bottle-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.

plural of open secret