1. [ verb ] cause to open or to become open
Synonyms: open_up

"Mary opened the car door"

Related terms: close unlock pry reopen break_open click_open gap lance uncork unbolt unbar unseal opening opener
2. [ verb ] start to operate or function or cause to start operating or functioning
Synonyms: open_up

"open a business"

Related terms: close establish first_step opening
3. [ adjective ] affording unobstructed entrance and exit; not shut or closed
Synonyms: unfastened

"an open door" "they left the door open"

Related terms: shut wide-open wide-open ajar
4. [ verb ] become open
Synonyms: open_up

"The door opened"

Related terms: close change_state fly_open unfasten opening
5. [ adjective ] affording free passage or access

"open drains" "the road is open to traffic" "open ranks"

Related terms: closed opened yawning unstoppered unsealed
6. [ verb ] begin or set in action, of meetings, speeches, recitals, etc.

"He opened the meeting with a long speech"

Related terms: close start inaugurate call_to_order pioneer opener
7. [ adjective ] with no protection or shield
Synonyms: exposed

"the exposed northeast frontier" "open to the weather" "an open wound"

Related terms: unprotected
8. [ adjective ] open to or in view of all

"an open protest" "an open letter to the editor"

Related terms: public
9. [ verb ] make available, as of an opportunity
Synonyms: open_up

"This opens up new possibilities"

Related terms: yield
10. [ verb ] spread out or open from a closed or folded state
Synonyms: spread spread_out unfold

"open the map" "spread your arms"

Related terms: fold undo grass butterfly divaricate uncross splay exfoliate opening
11. [ adjective ] used of mouth or eyes
Synonyms: opened

"keep your eyes open" "his mouth slightly opened"

Related terms: closed round-eyed round-eyed agape yawning agaze
12. [ adjective ] not having been filled

"the job is still open"

Related terms: available
13. [ adjective ] accessible to all

"open season" "an open economy"

Related terms: unrestricted
14. [ adjective ] not defended or capable of being defended
Synonyms: undefendable undefended assailable

"an open city" "open to attack"

Related terms: vulnerable
15. [ adjective ] opened out

"an open newspaper"

Related terms: unfolded
16. [ adjective ] (of textures) full of small openings or gaps
Synonyms: loose

"an open texture" "a loose weave"

Related terms: coarse
17. [ verb ] become available
Synonyms: open_up

"an opportunity opened up"

Related terms: arise opening
18. [ adjective ] having no protecting cover or enclosure

"an open boat" "an open fire" "open sports cars"

Related terms: unenclosed
19. [ noun ] a clear or unobstructed space or expanse of land or water
Synonyms: clear

: "finally broke out of the forest into the open"

Related terms: area clear
20. [ adjective ] not sealed or having been unsealed
Synonyms: opened

"the letter was already open" "the opened package lay on the table"

Related terms: unsealed
21. [ adjective ] not brought to a conclusion; subject to further thought
Synonyms: undetermined unresolved undecided

"an open question" "our position on this bill is still undecided" "our lawsuit is still undetermined"

Related terms: unsettled
22. [ adjective ] without undue constriction as from e.g. tenseness or inhibition

"the clarity and resonance of an open tone" "her natural and open response"

Related terms: unconstricted
23. [ noun ] where the air is unconfined
Synonyms: air out-of-doors open_air outdoors

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

Related terms: outside
24. [ adjective ] relatively empty of and unobstructed by fences or hedges or headlands or shoals

"in open country" "the open countryside" "open waters" "on the open seas"

Related terms: empty
25. [ verb ] have an opening or passage or outlet

"The bedrooms open into the hall"

Related terms: opening orifice
26. [ adjective ] (mathematics) of a set; containing points whose neighborhood consists of other points of the same set, or being the complement of an open set; of an interval; containing neither of its end points
Related terms: closed mathematics
27. [ verb ] (chess) make the opening move, in chess

"Kasparov opened with a standard opening"

Related terms: move chess
28. [ adjective ] open and observable; not secret or hidden
Synonyms: overt

"an overt lie" "overt hostility" "overt intelligence gathering"

Related terms: covert obvious undisguised bald naked public explicit unconcealed
29. [ adjective ] without any attempt at concealment; completely obvious
Synonyms: blatant conspicuous blazing

"open disregard of the law" "open family strife" "open hostility" "a blatant appeal to vanity" "a blazing indiscretion"

Related terms: unconcealed
30. [ adjective ] not secret

"open plans" "an open ballot"

Related terms: unconcealed
31. [ adjective ] receptive to new ideas

"an open mind" "open to new ideas"

Related terms: unprejudiced
32. [ adjective ] ready for business

"the stores are open"

Related terms: active
33. [ adjective ] not requiring union membership

"an open shop employs nonunion workers"

Related terms: nonunion
34. [ adjective ] openly straightforward and direct without reserve or secretiveness
Synonyms: heart-to-heart candid

"his candid eyes" "an open and trusting nature" "a heart-to-heart talk"

Related terms: ingenuous
35. [ adjective ] sincere and free of reserve in expression

"Please be open with me"

Related terms: honest
36. [ adjective ] (`capable' is usually followed by `of' or `to') possibly accepting or permitting
Synonyms: subject_to capable open_to subject

"a passage capable of misinterpretation" "open to interpretation" "an issue open to question" "the time is subject to much variation"

Related terms: susceptible
37. [ adjective ] lax in enforcing laws
Synonyms: lawless wide-open

"an open town"

Related terms: unlawful
38. [ adjective ] openly straightforward and direct without reserve or secretiveness
Synonyms: candid

"his candid eyes" "an open and trusting nature"

Related terms: ingenuous
39. [ verb ] display the contents of a file or start an application as on a computer
Related terms: close expose
40. [ noun ] (sport) a tournament in which both professionals and amateurs may play
Related terms: tournament
41. [ adjective ] affording free passage or view
Synonyms: clear free

"a clear view" "a clear path to victory"

Related terms: unobstructed
42. [ adjective ] (music) used of string or hole or pipe of instruments
Synonyms: unstopped
Related terms: stopped music
43. [ verb ] afford access to
Synonyms: give afford

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

Related terms: orifice
44. [ adjective ] lax in enforcing laws
Synonyms: wide-open lawless

"an open town"

Related terms: unlawful
45. [ noun ] information that has become public
Synonyms: surface

"all the reports were out in the open" "the facts had been brought to the surface"

Related terms: public_knowledge come_on
Similar spelling:   opine