Something that is in its beta stage, or being tested.

Pertaining to a product sold by merchants at a discount, because the item was returned but found not to be defective.

plural of open problem

open up (especially referring to doors)

Any successful means of achieving a result, especially means that are magical or technical, or otherwise beyond the understanding of most people.

Done with the hand open rather than clenched / Liberal and generous. / Frank, honest, and tolerant. / Characterized by looseness and fullness.

With an open hand or hands. / Generously.

simple past tense and past participle of open-hand

That part of the sea out of sight of land. / A sea open to all nations, i.e. not a mare clausum.

(sometimes attributive) Creative work that others can freely and legally copy or modify.