Allowing access, passage, or a view through an empty space; not closed or blocked
Take bets and pay out winnings on the outcome of a race or other contest or event
Open a bottle, especially of wine, and drink from it
Look out for something with particular attention
With no restrictions on those allowed to participate
Outdoors or in the countryside
the door's open
A fair chance
The fruit of the medlar tree, Mespilus germanica; a medlar.
= loose back.
A person or thing that is easily understood or interpreted
Involving or consisting of open cells; specifically designating a foam in which the cells interconnect, rendering the foam highly compressible and absorbent.
An excavation which is open to the surface; = opencast.
With the eyes open or wide open
An undefended goal; a goal scored into this.
A stream of air in a wind tunnel which is not bounded by rigid walls in the working section.
A control loop without feedback, each operation or activity being affected only by those earlier in the sequence; frequently attributive.
A mind that is accessible or receptive, especially to new arguments or ideas; a candid or honest mind. Also (especially in later use): an unprejudiced mind. Frequently in to keep an open mind and variants: to be ready to consider a matter without prejudice.
A collar of a shirt, sweater, etc., that leaves the neck uncovered.
A pitched roof with exposed rafters and no ceiling.
A farm or station where shearers are not contracted before the start of shearing but taken on as needed.
= open skies.
A technical college modelled on the Open University, providing distance-learning courses or training in technical subjects.
The time during which something specified is open, unclosed, unsealed, accessible, etc.
= open city.
A large open-plan ward for the accommodation of many patients.
North American a wood in which there is no undergrowth.
A year in which the business of a syndicate of underwriters at Lloyd's cannot be closed at the normal time because of liabilities still outstanding.
Begin to shoot
A free or unenclosed space outdoors
A bar at a special function at which the drinks have been paid for by the host or are prepaid through the admission fee
Lack of occlusion of the front teeth when the jaw is closed normally
A city declared to be unfortified and undefended and so, by international law, exempt from enemy attack
A future available date for which no sports fixture has yet been arranged
A day when members of the public may visit a place or institution to which they do not usually have access
An unrestricted means of admission or access
Ice-covered water through which navigation is possible
Denoting or relating to a trip in which an airline passenger flies in to one destination and returns from another
A telephone line on which conversations can be overheard or intercepted by others
A session in a club where anyone is welcome to sing or perform stand-up comedy
North American term for opencast.
(Of a room or building) having large rooms with few or no internal dividing walls
(Of a tape recorder) having reels of tape requiring individual threading, as distinct from a cassette
A main road, especially one outside an urban area where progress is unimpeded
An expanse of sea away from land
A system whereby employees in a place of work do not have to join a trade union
The side of the scrum on which the main line of the opponents' backs is ranged