Allowing access, passage, or a view through an empty space; not closed or blocked up
Look out for something with particular attention
With no restrictions on those allowed to attend or participate
the door's open
A fair chance
Begin to shoot a weapon
A free or unenclosed space outdoors
The fruit of the medlar tree, Mespilus germanica; a medlar.
= loose back.
A bar at a special function at which the drinks have been paid for by the host or are prepaid through an admission fee
Lack of occlusion of the front teeth when the jaw is closed normally
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.
A city declared to be unfortified and undefended and so, by international law, exempt from enemy attack
An excavation which is open to the surface; = opencast.
A future date for which no event 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
Free or unrestricted means of admission or access
With the eyes open or wide open
An undefended goal; a goal scored into this.
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 stream of air in a wind tunnel which is not bounded by rigid walls in the working section.
A means of easy access or communication
A control loop without feedback, each operation or activity being affected only by those earlier in the sequence; frequently attributive.
A session in a club during which anyone is welcome to sing or perform stand-up comedy
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.
Denoting a method of mining in which coal or ore is extracted at or from a level near the earth’s surface, rather than from underground workings
(Of a building or floor plan) having large open areas with few or no internal dividing walls
(Of an audiotape recorder) having reels of tape requiring individual threading, as distinct from a cassette
A road or highway allowing easy travel, especially one outside an urban area
A pitched roof with exposed rafters and no ceiling.
An expanse of sea away from land
A farm or station where shearers are not contracted before the start of shearing but taken on as needed.
A system whereby employees in a place of work are not required to join a labor union
The side of the scrum on which the main line of the opponents' backs is ranged
= 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.
(Of a shoe) having an upper that does not cover the toes
(Of a vehicle) not having a roof or having a folding or detachable roof
= 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.