open
adjective
1. affording unobstructed entrance and exit; not shut or closed
- an open door
- they left the door open
Similar word(s): ajar, open, unfastened
2. affording free passage or access
- open drains
- the road is open to traffic
- open ranks
Similar word(s): open, unfastened, opened, unstoppered, yawning, unsealed
3. with no protection or shield
- open to the weather
- an open wound
Similar word(s): unprotected, exposed
4. open to or in view of all
- an open protest
- an open letter to the editor
Similar word(s): public
5. used of mouth or eyes
- keep your eyes open
- his mouth slightly opened
Similar word(s): agape, gaping, agaze, staring, wide, yawning, opened
6. not having been filled
- the job is still open
Similar word(s): available
7. accessible to all
- open season
- an open economy
Similar word(s): unrestricted
8. not defended or capable of being defended
- an open city
- open to attack
Similar word(s): vulnerable, assailable, undefendable, undefended
9. (of textures) full of small openings or gaps
- an open texture
Similar word(s): coarse, harsh, loose
10. having no protecting cover or enclosure
- an open boat
- an open fire
- open sports cars
Similar word(s): unenclosed
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
Similar word(s): unsettled, undecided, undetermined, unresolved
13. not sealed or having been unsealed
- the letter was already open
- the opened package lay on the table
Similar word(s): unsealed, opened
14. without undue constriction as from e.g. tenseness or inhibition
- the clarity and resonance of an open tone
- her natural and open response
Similar word(s): unconstricted
15. ready or willing to receive favorably
Similar word(s): acceptant, acceptive, admissive, assimilative, hospitable, receptive
16. open and observable; not secret or hidden
- open ballots
Similar word(s): explicit, expressed, bald, barefaced, naked, raw, undisguised, visible, public, unconcealed, overt
17. possibly accepting or permitting
- open to interpretation
- an issue open to question
Similar word(s): susceptible, capable, subject
18. affording free passage or view
- open waters
- the open countryside
Similar word(s): unobstructed, clear
19. (of a person) openly straightforward and direct without secretiveness.
- an open and trusting nature
Similar word(s): artless, ingenuous, candid
20. ready for business
- the stores are open
Similar word(s): active
Sentences with open as an adjective:
- Turn left after the second open door.
- It was as if his body had gone to sleep standing up and with his eyes open.
- an open hand; an open flower; an open prospect
- Banks are not open on bank holidays.
- I am open to new ideas.
- He published an open letter to the governor on a full page of the New York Times.
- The man is an open book.
- I couldn't save my changes because another user had the same file open.
- I've got open orders for as many containers of red durum as you can get me.
- to keep an offer or opportunity open
noun
1. a clear or unobstructed space or expanse of land or water
- finally broke out of the forest into the open
Similar word(s): clear
Definition categories: location, area, country
2. where the air is unconfined
- the concert was held in the open air
- camping in the open
Similar word(s): outdoors
Definition categories: location, exterior, outside
3. a tournament in which both professionals and amateurs may play
Definition categories: event, tournament, tourney
4. information that has become public
- all the reports were out in the open
Similar word(s): surface
Definition categories: thought
Sentences with open as a noun:
- The electrician found the open in the circuit after a few minutes of testing.
- I can't believe you left the lawnmower out in the open when you knew it was going to rain this afternoon!
- Wary of hunters, the fleeing deer kept well out of the open, dodging instead from thicket to thicket.
- We have got to bring this company's corrupt business practices into the open.
verb
1. cause to open or to become open
- Mary opened the car door
Definition categories: contact
2. start to operate or function or cause to start operating or functioning
- open a business
Definition categories: social
3. become open
- The door opened
Definition categories: contact, turn
4. begin or set in action, of meetings, speeches, recitals, etc.
- He opened the meeting with a long speech
Definition categories: social, commence, start
5. spread out or open from a closed or folded state
- open the map
Similar word(s): spread, unfold
Definition categories: contact, undo
6. make available
- This opens up new possibilities
Definition categories: change, afford, give, yield
7. become available
- an opportunity opened up
Definition categories: change, arise
8. have an opening or passage or outlet
- The bedrooms open into the hall
Definition categories: stative
9. make the opening move
- Kasparov opened with a standard opening
Definition categories: competition, go, move
10. afford access to
- the door opens to the patio
Definition categories: possession
11. display the contents of a file or start an application as on a computer
Definition categories: perception, display, exhibit, expose
Sentences with open as a verb:
- Turn the doorknob to open the door.
- He opened a path through the undergrowth.
- I don't want to open that subject.
- I will open the shop an hour early tomorrow.
- Vermont will open elk hunting season next week.
- The door opened all by itself.
- The shop opens at 9:00.
- to open a discussion; to open fire upon an enemy; to open trade, or correspondence; to open a case in court, or a meeting
- After the first two players fold, Julie opens for $5.
- Jeff opens his hand revealing a straight flush.
- to open a closed fist
- to open matted cotton by separating the fibres