to expand, to widen, to unwrap or unfold, to spread out from a compact state

Third-person singular simple present indicative form of break open

Third-person singular simple present indicative form of lay open

(UK) A system of bus operation where passengers may enter through various doors along the vehicle's length without having to pass the driver to buy or show a ticket.

plural of open world

(video games) A gameworld that the player may traverse freely, rather than being restricted to certain predefined areas and quests.

plural of open-topper

Having an open top. / (of a vehicle) Having no roof, or having a top folded or detached.

(informal, computing) A programmer who works only on open source programs.

plural of open tuning