- (of type) in outline form.
- widely spaced or leaded, as printed matter.
- (of an organ pipe) not closed at the far end.
- (of a string) not stopped by a finger.
- (of a note) produced by such a pipe or string or, on a wind instrument, without the aid of a slide, key, etc.
- (of an interval) containing neither endpoint.
- (of a set) consisting of points having neighborhoods wholly contained in the set, as the set of points within a circle.
- (of a map from one topological space to another) having the property that the image of an open set is an open set.
verb (used with object)
- to recall or revoke (a judgment, decree, etc.) for the purpose of allowing further contest or delay.
- to make the first statement of (a case) to the court or jury.
verb (used without object)
- the unenclosed or unobstructed country.
- the outdoors: Vacations in the open are fine for the entire family.
- the condition of being unconcealed, recognized, or publicly known: The scandal is now out in the open.
- to become or make open.
- to expand, especially before the eye: A breathtaking panorama opened up as we reached the top of the hill.
- to achieve the initial development of: to open up a business office; to open up trade with China.
- Slang.to increase speed or the speed of (a vehicle).
Origin of open
Synonyms for open
Examples from the Web for semiopen
Historical Examples of semiopen
Her equipages were the huge family coach in which she had traveled to Voronezh, a semiopen trap, and a baggage cart.War and Peace
- (of a violin or guitar string) not stopped with the finger
- (of a pipe, such as an organ pipe) not closed at either end
- (of a note) played on such a string or pipe
- in operation; activean open account
- unrestricted; unlimitedopen credit; open insurance cover
- (of a goal, court, etc) unguarded or relatively unprotectedthe forward missed an open goal
- (of a stance, esp in golf) characterized by the front of the body being turned forward
- denoting a vowel pronounced with the lips relatively wide apart
- denoting a syllable that does not end in a consonant, as in pa
Word Origin for open
early 13c., "an aperture or opening," from open (adj.). Meaning "public knowledge" (especially in out in the open) is from 1942, but cf. Middle English in open (late 14c.) "manifestly, publicly." The sense of "an open competition" is from 1926, originally in a golf context.
Old English openian "to open, open up, disclose, reveal," also intransitive, "become manifest, be open to or exposed to," from Proto-Germanic *opanojan (cf. Old Saxon opanon, Old Norse opna "to open," Middle Dutch, Dutch openen, Old High German offanon, German öffnen), from the source of open (adj.), but etymology suggests the adjective is older. Open up "cease to be secretive" is from 1921. Related: Opened; opening.
Old English open "not closed down, raised up" (of gates, eyelids, etc.), also "exposed, evident, well-known, public," often in a bad sense, "notorious, shameless;" from Proto-Germanic *upana, literally "put or set up" (cf. Old Norse opinn, Swedish öppen, Danish aaben, Old Saxon opan, Old Frisian epen, Old High German offan, German offen "open"), from PIE *upo "up from under, over" (cf. Latin sub, Greek hypo; see sub-). Related to up, and throughout Germanic the word has the appearance of a past participle of *up (v.), but no such verb has been found. The source of words for "open" in many Indo-European languages seems to be an opposite of the word for "closed, shut" (e.g. Gothic uslukan).
Of physical spaces, "unobstructed, unencumbered," c.1200; of rooms with unclosed entrances, c.1300; of wounds, late 14c. Transferred sense of "frank, candid" is attested from early 14c. Of shops, etc., "available for business," it dates from 1824. Open-handed "liberal, generous" is from c.1600. Open door in reference to international trading policies is attested from 1856. Open season is first recorded 1896, of game; and figuratively 1914 of persons. Open book in the figurative sense of "person easy to understand" is from 1853. Open house "hospitality for all visitors" is first recorded 1824. Open-and-shut "simple, straightforward" first recorded 1841 in New Orleans. Open marriage, one in which the partners sleep with whomever they please, is from 1972. Open road (1817, American English) originally meant a public one; romanticized sense of "traveling as an expression of personal freedom" first recorded 1856, in Whitman.
In addition to the idioms beginning with open
- open and aboveboard
- open and shut
- open book
- open doors
- open fire
- open house, keep
- open mind
- open one's eyes
- open one's heart to
- open one's mouth
- open question
- open season on
- open secret
- open the door to
- open up
- open with
- keep a weather eye (open)
- keep one's eyes open
- lay open
- leave open
- leave the door open
- not open one's mouth
- out in the open
- throw open
- wide open
- with one's eyes open
- with open arms