OPEN
[oh-puh n]
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 (such 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: such as
a : enterable by both amateur (see amateur 1) and professional (see 1professional 2a) 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 an open vowel (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 an open computer platform
10
a : characterized by ready accessibility and usually generous attitude: such as (1) : generous in giving (2) : willing to hear and consider or to accept and deal with : responsive open to an offer open to suggestion (3) : free from reserve or pretense : frank was open about his personal life (4) of a relationship : not restricted to one partner at a time by mutual agreement — see also open marriage
b : accessible to the influx of new factors (such as foreign goods) an open market
11
a : having openings, interruptions, or spaces open mesh: such as (1) : being porous (see porous 2a) and friable open soil (2) : sparsely distributed : scattered open population (3) of a compound : having components (see 1component 1) separated by a space in writing or printing (such as opaque projector)
b : not made up of a continuous closed circuit (see 1circuit 2a) 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 (see enterprise 3) an open town (2) : not repressed (see repress 1) 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 when possible without causing misinterpretation
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 (see 2mass 1c) to halt expansion gravitationally
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