open

I. adjective (opener; openest) Etymology: Middle English, from Old English; akin to Old High German offan open, Old English ūp up Date: before 12th century 1. having no enclosing or confining barrier ; accessible on all or nearly all sides <
cattle grazing on an open range
>
2. a. (1) being in a position or adjustment to permit passage ; not shut or locked <
an open door
>
(2) having a barrier (as a door) so adjusted as to allow passage <
the house was open
>
b. having the lips parted <
stood there with his mouth wide open
>
c. not buttoned or zipped <
an open shirt
>
3. a. completely free from concealment ; exposed to general view or knowledge <
their hostilities eventually erupted with open war
>
b. exposed or vulnerable to attack or question ; subject <
open to doubt
>
c. being an operation or surgical procedure in which an incision is made such that the tissues are fully exposed 4. a. not covered with a top, roof, or lid <
an open car
>
<
her eyes were open
>
b. having no protective covering <
open wiring
>
<
an open wound
>
5. not restricted to a particular group or category of participants <
open to the public
>
<
open housing
>
: as a. enterable by both amateur and professional contestants <
an open tournament
>
b. enterable by a registered voter regardless of political affiliation <
an open primary
>
6. fit to be traveled over ; presenting no obstacle to passage or view <
the open road
>
<
open country
>
7. having the parts or surfaces laid out in an expanded position ; spread out ; unfolded <
an open book
>
8. a. (1) low 13 (2) formed with the tongue in a lower position <
Italian has an open and a close e
>
b. (1) having clarity and resonance unimpaired by undue tension or constriction of the throat <
an open vocal tone
>
(2) of a tone produced by an open string or on a wind instrument by the lip without the use of slides, valves, or keys 9. a. available to follow or make use of <
the only course open to us
>
b. not taken up with duties or engagements <
keep an hour open on Friday
>
c. not finally decided ; subject to further consideration <
the salary is open
>
<
an open question
>
d. available for a qualified applicant ; vacant <
the job is still open
>
e. remaining available for use or filling until canceled <
an open order for more items
>
f. available for future purchase <
these items are in open stock
>
g. available for breeding ; not now pregnant <
an open heifer
>
h. not proprietary ; available to third party developers <
open source code
>
10. a. characterized by ready accessibility and usually generous attitude: as (1) generous in giving (2) willing to hear and consider or to accept and deal with ; responsive (3) free from reserve or pretense ; frank b. accessible to the influx of new factors (as foreign goods) <
an open market
>
11. a. having openings, interruptions, or spaces <
open mesh
>
: as (1) being porous and friable <
open soil
>
(2) sparsely distributed ; scattered <
open population
>
(3) of a compound having components separated by a space in writing or printing (as opaque projector) b. not made up of a continuous closed circuit of channels <
the insect circulatory system is open
>
12. a. of an organ pipe not stopped at the top b. of a string on a musical instrument not stopped by the finger 13. being in operation <
an open microphone
>
; especially ready for business, patronage, or use <
the store is open from 9 to 5
>
<
the new highway will be open next week
>
14. a. (1) characterized by lack of effective regulation of various commercial enterprises <
an open town
>
(2) not repressed by legal controls <
open gambling
>
b. free from checking or hampering restraints <
an open economy
>
c. relatively unguarded by opponents <
passed to an open teammate
>
15. having been opened by a first ante, bet, or bid <
the bidding is open
>
16. of punctuation characterized by sparing use especially of the comma 17. a. containing none of its endpoints <
an open interval
>
b. being a set or composed of sets each point of which has a neighborhood all of whose points are contained in the set <
the interior of a sphere is an open set
>
18. a. being an incomplete electrical circuit b. not allowing the flow of electricity <
an open switch
>
19. of a universe having insufficient mass to halt expansion gravitationally Synonyms: see frank, liableopen adverbopenly adverbopenness noun II. verb (opened; opening) Date: before 12th century transitive verb 1. a. to move (as a door) from a closed position b. to make available for entry or passage by turning back (as a barrier) or removing (as a cover or an obstruction) 2. a. to make available for or active in a regular function <
open a new store
>
b. to make accessible for a particular purpose <
opened new land for settlement
>
<
open the way for changes
>
c. to initiate access to (a computer file) prior to use 3. a. to disclose or expose to view ; reveal b. to make more discerning or responsive ; enlighten <
must open our minds to the problems
>
c. to bring into view or come in sight of by changing position 4. a. to make an opening in <
opened the boil
>
b. to loosen and make less compact <
open the soil
>
5. to spread out ; unfold <
opened the book
>
6. a. to enter upon ; begin <
opened the meeting
>
b. to commence action in a card game by making (a first bid), putting a first bet in (the pot), or playing (a card or suit) as first lead 7. to restore or recall (as an order) from a finally determined state to a state in which the parties are free to prosecute or oppose intransitive verb 1. to become open <
the office opened early
>
2. a. to spread out ; expand <
the wound opened under the strain
>
b. to become disclosed <
a beautiful vista opened before us
>
3. to become enlightened or responsive 4. to give access <
the rooms open onto a hall
>
5. speak out 2 <
finally he opened freely on the subject
>
6. a. to begin a course or activity <
the play opens on Tuesday
>
b. to make a bet, bid, or lead in commencing a round or hand of a card game 7. to provide the opening performance of a show before the main event • openability nounopenable adjective III. noun Date: 13th century 1. opening 2. open and unobstructed space: as a. open air b. open water 3. an open contest, competition, or tournament 4. a public or unconcealed state or position

New Collegiate Dictionary. 2001.

Synonyms:

Look at other dictionaries:

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