英音 [ˈəʊpən] 美音 [ˈoʊpən]
vt.& vi. （打）开;开始;睁开;启动;
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"
affording unobstructed entrance and exit; not shut or closed;
"an open door"
"they left the door open"
affording free passage or access;
"the road is open to traffic"
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;
"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 intelligence gathering"
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"
"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"
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"
"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"
"This opens up new possibilities"
"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
autopen n. 自动笔（一种能模仿签名笔迹的装置）;
opener n. 开启者;开启工具;
openhanded adj. 大方的，豪爽的;手松;
openhearted adj. 不隐瞒的，不客气的;光明;
opening n. 开幕，开始;空缺的职位;[商]开盘，交易开始时间;（职位的）空缺; adj. 首次的，开始的; v. （打）开( open的现在分词);开始;睁开;启动;
openwork n. 透孔织物;
reopen vt.& vi. 再开，重新打开;重新开始;