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'open' - used as an adjective
Synonyms for 'open'
1. affording unobstructed entrance and exit; not shut or closed
an open door
they left the door open
2. affording free passage or access
open drains
the road is open to traffic
open ranks
3. with no protection or shield
open to the weather
an open wound
4. open to or in view of all
an open protest
an open letter to the editor
5. used of mouth or eyes
keep your eyes open
6. not having been filled
the job is still open
7. accessible to all
open season
an open economy
8. not defended or capable of being defended
an open city
open to attack
9. (of textures) full of small openings or gaps
an open texture
10. having no protecting cover or enclosure
an open boat
an open fire
open sports cars
11. (set theory) of an interval that contains neither of its endpoints
12. not brought to a conclusion; subject to further thought
an open question
13. not sealed or having been unsealed
the letter was already open
14. without undue constriction as from e.g. tenseness or inhibition
the clarity and resonance of an open tone
her natural and open response
15. ready or willing to receive favorably
16. open and observable; not secret or hidden
open ballots
17. not requiring union membership
an open shop employs nonunion workers
18. possibly accepting or permitting
open to interpretation
an issue open to question
19. affording free passage or view
open waters
the open countryside
20. openly straightforward and direct without reserve or secretiveness
an open and trusting nature
21. ready for business
the stores are open

'open' - used as a noun
22. a clear or unobstructed space or expanse of land or water
finally broke out of the forest into the open
23. where the air is unconfined
the concert was held in the open air
camping in the open
24. a tournament in which both professionals and amateurs may play
25. information that has become public
all the reports were out in the open

'open' - used as a verb
26. cause to open or to become open
Mary opened the car door
27. start to operate or function or cause to start operating or functioning
open a business
28. become open
The door opened
29. begin or set in action, of meetings, speeches, recitals, etc.
He opened the meeting with a long speech
30. spread out or open from a closed or folded state
open the map
31. make available
This opens up new possibilities
32. become available
an opportunity opened up
33. have an opening or passage or outlet
The bedrooms open into the hall
34. make the opening move
Kasparov opened with a standard opening
35. afford access to
the door opens to the patio
36. display the contents of a file or start an application as on a computer

derived forms
1. Open / Plural
2. Open / Past
3. Open / Third Person
4. Open / Present Participle
5. Open / Comparitive
6. Open / Superlative
The following are synonyms for 'open'. Click on any of them to get both Bibliodata's full list of common definitions and a further set of synonyms.
See also
  • shut
  • closed
  • close
    Who Said that ?
    Why not say it? I'm bursting out of my cocoon. It was all too nice in the past - it never knocked anyone out. But last year... my first opening night at the Met - I looked out and heard all that cheering... for me... And I loved it. - Click here to find out.
    Fact of the day
    The first open heart surgery was performed by Dr. Daniel Hall Williams in 1893.