1.a clear or unobstructed space or expanse of land or water;

finally broke out of the forest into the open

2.where the air is unconfined;

he wanted to get outdoors a little

3.a tournament in which both professionals and amateurs may play

4.information that has become public;

all the reports were out in the open

5.affording unobstructed entrance and exit; not shut or closed;

an open door

6.affording free passage or access;

open drains

7.with no protection or shield;

the exposed northeast frontier

8.open to or in view of all;

an open protest

9.used of mouth or eyes;

keep your eyes open

10.not having been filled;

the job is still open

11.accessible to all;

open season

12.not defended or capable of being defended;

an open city

13.(of textures) full of small openings or gaps;

an open texture

14. having no protecting cover or enclosure;

an open boat

15. opened out;

an open newspaper

16. 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

17. not brought to a conclusion; subject to further thought;

an open question

18. not sealed or having been unsealed;

the letter was already open

19. without undue constriction as from e.g. tenseness or inhibition;

the clarity and resonance of an open tone

20. relatively empty of and unobstructed by fences or hedges or headlands or shoals;

in open country

21. open and observable; not secret or hidden;

an overt lie

22. used of string or hole or pipe of instruments

23. not requiring union membership;

an open shop employs nonunion workers

24. possibly accepting or permitting;

a passage capable of misinterpretation

25. not secret;

open plans

26. without any attempt at concealment; completely obvious;

open disregard of the law

27. affording free passage or view;

a clear view

28. lax in enforcing laws;

an open town

29. openly straightforward and direct without reserve or secretiveness;

his candid eyes

30. sincere and free of reserve in expression;

Please be open with me

31. receptive to new ideas;

an open mind

32. ready for business;

the stores are open

1.cause to open or to become open;

Mary opened the car door

2.start to operate or function or cause to start operating or functioning;

open a business

3.become open;

The door opened

4.begin or set in action, of meetings, speeches, recitals, etc.;

He opened the meeting with a long speech

5.spread out or open from a closed or folded state;

open the map

6.make available;

This opens up new possibilities

7.become available;

an opportunity opened up

8.have an opening or passage or outlet;

The bedrooms open into the hall

9.make the opening move;

Kasparov opened with a standard opening

10. afford access to;

the door opens to the patio

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

1.It was I who opened a can of beans.

是我惹的祸。

2.She was one of those people who like opening a can of beans.

她就是那种喜欢惹祸的人。

3.It has kept my eyes open that the boy stutters.

我已注意到了，这男孩子说活口吃。

4.He's keeping an eye out for a more profitable job.

他正在留心找个更能赚钱的工作。