Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for open from the 1913 edition of Webster's Revised Unabridged Dictionary. Define open using one of the most comprehensive free online dictionaries on the web.

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open
Part of Speech: Noun
Results: 25
1. Free to be used, enjoyed, visited, or the like; not private; public; unrestricted in use; as, an open library, museum, court, or other assembly; liable to the approach, trespass, or attack of any one; unprotected; exposed.
2. Free or cleared of obstruction to progress or to view; accessible; as, an open tract; the open sea.
3. Not drawn together, closed, or contracted; extended; expanded; as, an open hand; open arms; an open flower; an open prospect.
4. Not concealed or secret; not hidden or disguised; exposed to view or to knowledge; revealed; apparent; as, open schemes or plans; open shame or guilt.
8. Produced by an open string; as, an open tone.
10. Not of a quality to prevent communication, as by closing water ways, blocking roads, etc.; hence, not frosty or inclement; mild; - used of the weather or the climate; as, an open season; an open winter.
11. Uttered with a relatively wide opening of the articulating organs; - said of vowels; as, the an far is open as compared with the a in say.
13. Openly.
Part of Speech: noun
1. or unobstructed space; clear land, without trees or obstructions; open ocean; open water.
2. Free of access; not shut up; not closed; affording unobstructed ingress or egress; not impeding or preventing passage; not locked up or covered over; -- applied to passageways; as, an open door, window, road, etc.; also, to inclosed structures or objects; as, open houses, boxes, baskets, bottles, etc.; also, to means of communication or approach by water or land; as, an open harbor or roadstead.
Part of Speech: verb
Part of Speech: verb transitive
1. To make or set open; to render free of access; to unclose; to unbar; to unlock; to remove any fastening or covering from; as, to open a door; to open a box; to open a room; to open a letter.
2. To spread; to expand; as, to open the hand.
5. To enter upon; to begin; as, to open a discussion; to open fire upon an enemy; to open trade, or correspondence; to open a case in court, or a meeting.
6. To loosen or make less compact; as, to open matted cotton by separating the fibers.
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