Open
WordNet
adjective
(1) Ready for business
"The stores are open"
(2) Not having been filled
"The job is still open"
(3) Openly straightforward and direct without reserve or secretiveness
"His candid eyes"
"An open and trusting nature"
"A heart-to-heart talk"
(4) Without undue constriction as from e.g. tenseness or inhibition
"The clarity and resonance of an open tone"
"Her natural and open response"
(5) Affording free passage or view
"A clear view"
"A clear path to victory"
"Open waters"
"The open countryside"
(6) Affording unobstructed entrance and exit; not shut or closed
"An open door"
"They left the door open"
(7) Affording free passage or access
"Open drains"
"The road is open to traffic"
"Open ranks"
(8) Used of mouth or eyes
"Keep your eyes open"
"His mouth slightly opened"
(9) Having no protecting cover or enclosure
"An open boat"
"An open fire"
"Open sports cars"
(10) (set theory) of an interval that contains neither of its endpoints
(11) Open and observable; not secret or hidden
"An overt lie"
"Overt hostility"
"Overt intelligence gathering"
"Open ballots"
(12) Open to or in view of all
"An open protest"
"An open letter to the editor"
(13) With no protection or shield
"The exposed northeast frontier"
"Open to the weather"
"An open wound"
(14) Ready or willing to receive favorably
"Receptive to the proposals"
(15) Accessible to all
"Open season"
"An open economy"
(16) Not sealed or having been unsealed
"The letter was already open"
"The opened package lay on the table"
(17) 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"
(18) (of textures) full of small openings or gaps
"An open texture"
"A loose weave"
(19) 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"
(20) Not defended or capable of being defended
"An open city"
"Open to attack"
noun
(21) Information that has become public
"All the reports were out in the open"
"The facts had been brought to the surface"
(22) A tournament in which both professionals and amateurs may play
(23) Where the air is unconfined
"He wanted to get outdoors a little"
"The concert was held in the open air"
"Camping in the open"
(24) A clear or unobstructed space or expanse of land or water
"Finally broke out of the forest into the open"
verb
(25) Make available
"This opens up new possibilities"
WiktionaryText
Etymology
open, from from "up from under, over"
Adjective
- Which is not closed; accessible; as, an open gate.
- Turn left after the second open door.
- 1908, Kenneth Grahame, The Wind in the Willows, Chapter 2
- The open road, the dusty highway...
- It was as if his body had gone to sleep standing up and with his eyes open.
- Actively conducting or prepared to conduct business.
- Banks are not open on bank holidays.
- Receptive.
- I am open to new ideas.
- Public; as, an open letter, an open declaration.
- He published an open letter to the governor on a full page of the New York Times.
- Candid, ingenuous, not subtle in character:
- The man is an open book.
- Having a free variable.
- In current use; mapped to part of memory.
- I couldn't save my changes because another user had the same file open.
Verb
- To make something accessible or removing an obstacle to something being accessible.
- Turn the doorknob to open the door.
- To bring up (a topic).
- I don't want to open that subject.
- To make accessible to customers or clients.
- I will open the shop an hour early tomorrow.
- To start (a campaign).
- Vermont will open elk hunting season next week.
- To become open.
- The door opened all by itself.
- To begin conducting business.
- The shop opens at 9:00.
- To begin a side's innings as one of the first two batsmen.
- To bet before any other player has in a particular betting round in a game of poker.
- After the first two players fold, Julie opens for $5.
- To reveal one's hand.
- Jeff opens his hand revealing a straight flush.
- To load into memory for viewing or editing.