open

a clear or unobstructed space or expanse of land or water; "finally broke out of the forest into the open"

where the air is unconfined; "he wanted to get outdoors a little"; "the concert was held in the open air"; "camping in the open"

a tournament in which both professionals and amateurs may play

information that has become public; "all the reports were out in the open"; "the facts had been brought to the surface"

cause to open or to become open; "Mary opened the car door"

start to operate or function or cause to start operating or functioning; "open a business"

become open; "The door opened"

begin or set in action, of meetings, speeches, recitals, etc.; "He opened the meeting with a long speech"

spread out or open from a closed or folded state; "open the map"; "spread your arms"

make available; "This opens up new possibilities"

become available; "an opportunity opened up"

have an opening or passage or outlet; "The bedrooms open into the hall"

make the opening move; "Kasparov opened with a standard opening"

afford access to; "the door opens to the patio"; "The French doors give onto a terrace"

display the contents of a file or start an application as on a computer

affording unobstructed entrance and exit; not shut or closed; "an open door"; "they left the door open"

affording free passage or access; "open drains"; "the road is open to traffic"; "open ranks"

with no protection or shield; "the exposed northeast frontier"; "open to the weather"; "an open wound"

open to or in view of all; "an open protest"; "an open letter to the editor"

used of mouth or eyes; "keep your eyes open"; "his mouth slightly opened"

not having been filled; "the job is still open"

accessible to all; "open season"; "an open economy"

not defended or capable of being defended; "an open city"; "open to attack"

(of textures) full of small openings or gaps; "an open texture"; "a loose weave"

having no protecting cover or enclosure; "an open boat"; "an open fire"; "open sports cars"

(set theory) of an interval that contains neither of its endpoints

not brought to a conclusion; subject to further thought; "an open question"; "our position on this bill is still undecided"; "our lawsuit is still undetermined"

not sealed or having been unsealed; "the letter was already open"; "the opened package lay on the table"

without undue constriction as from e.g. tenseness or inhibition; "the clarity and resonance of an open tone"; "her natural and open response"

ready or willing to receive favorably; "receptive to the proposals"

open and observable; not secret or hidden; "an overt lie"; "overt hostility"; "overt intelligence gathering"; "open ballots"

not requiring union membership; "an open shop employs nonunion workers"

possibly accepting or permitting; "a passage capable of misinterpretation"; "open to interpretation"; "an issue open to question"; "the time is fixed by the director and players and therefore subject to much variation"

affording free passage or view; "a clear view"; "a clear path to victory"; "open waters"; "the open countryside"

openly straightforward and direct without reserve or secretiveness; "his candid eyes"; "an open and trusting nature"; "a heart-to-heart talk"

ready for business; "the stores are open"