open (EN)

adjective, verb, noun

adjective “open”

1. not in a state of being closed
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   The door was open, so I walked right in.
2. spread out, extended
   The book lay open on the table, its pages spread wide.
3. (of a wound) exposing the inside of the body
   After the surgery, the patient had an open wound that needed to be carefully monitored to prevent infection.
4. (of a business) currently accepting customers
   The restaurant is open until midnight on weekends.
5. willing to receive or consider ideas or suggestions
   She was always open to new ideas.
6. available to the general public
   The mayor held an open meeting at the city hall, inviting all residents to attend and share their concerns.
7. not yet resolved or concluded
   The case remains open as new evidence has recently emerged.
8. being accessed or used currently in a computer
   Which file do you have open?
9. (of a valve) allowing fluid to pass through
   The valve was open to let the water flow through the pipe.
10. preventing electricity from flowing
    The circuit is open, so the lamp won't turn on until we close it.
11. having tasks or orders that are not yet completed
    She still has an open case with customer service regarding her refund.
12. (of weather) mild, not causing transportation problems (e.g. open winter)
    We enjoyed an open winter this year, with roads clear and the weather warm enough for outdoor activities.
13. (of a sandwich) made with only one slice of bread with a topping
    For lunch, she ordered an open turkey sandwich with cranberry sauce on top.
14. (about a string of an insrument) played without pressing the string against the fingerboard
    She began the song with an open string, letting the guitar's natural sound fill the room.
15. (mathematics) a set for which every point has a neighborhood that is still part of that set
    In our topology class, we learned that an open set does not include its boundary points.

verb “open”

1. cause to move from a closed to an open position
   She opened the window to let in some fresh air.
2. move from a closed to an open position by itself
   The opened thanks to the wind.
3. (of a business) to start accepting customers (at a particular time)
   The cafe opens early, welcoming customers by 7 AM.
4. (on a computer) access for viewing or editing
   I opened the document to make some edits before the meeting.
5. (of a valve) to change position to allow fluid to flow
   The technician opened the valve to let the steam flow through the pipes.
6. change position to stop electricity flow
   When the technician opened the circuit, the lights in the building went out.
7. to start (a discussion or addressing a topic)
   He hesitated before opening the conversation about their future together.
8. to spread (e.g. a fist or arms) into an open position
   She opened her arms wide to give him a hug.
9. place the first bet in a round of poker
   At the poker table, seeing his strong hand, Mike decides to open with a $50 bet.
10. show one's poker hand
    At the climax of the game, Sarah opened, showing a full house to the stunned table.
11. start batting in cricket
    Smith and Jones opened for their team in today's cricket match.

noun “open”

1. an area without obstructions
   The kids love playing in the open where they have plenty of space to run around.
2. (in the definite) public knowledge
   After the scandal, all the details of the mayor's misconduct were laid in the open for everyone to see.
3. a fault in an electrical circuit
   After hours of troubleshooting, the technician finally located the opens in the wiring that were causing the system to fail.
4. a competition open to all
   She trained hard for months to compete in the local tennis open.
5. the action of opening an electronic message
   After sending out the newsletter, we tracked the opens to see how many people were actually reading it.