open
- adjective
- /ˈoʊpən/
- Specialized
- The set of all points that lie within an open range does not include the boundaries.
- open rectangle
- open, not closed
I'm going to cover the space by open sets by open balls.
- I'm going to cover the space by open sets by open balls.
- And you're talking about the axiom systems with open sets.
Examples
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So therefore this is now a open circle between zero and two, and that is an open circle.
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The elements W that are elements of T are called open sets with respect to T.
Academic text (1998) -
So this shows that the empty set is open in Y.
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Following the initial open coding phase of the analysis, 159 open codes were identified.
Academic text (2014) -
The sections on experience contained 65 fixed response items and one open-ended question.
Academic text (2000) -
In mathematics, an interval is considered open if it does not include its endpoints.
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An open set in topology is defined as a set that does not contain its limit points.
Antonyms
Idioms
- Informal
Stay half awake and watch for danger while you sleep because you are afraid
- Offensive
To attack or punish someone suddenly and violently, often for something they did
- Offensive
To show a company's private information to others, often during business talks
- Informal
To not pay attention and miss what is happening around you, for example because you are daydreaming
- Informal
To try to make something happen when it is already easy or people already agree
Compounds
- Literature
A letter written to one person but published for everyone to read to make people notice a problem
- Specialized
An operation where doctors open the chest to operate on the heart
- NSFW
A marriage in which both partners allow each other to have sex with other people
- Literature
An early election before the main vote where any registered voter can vote for candidates of only one party
A way to let many countries trade equally with one country, used for China in the late 1800s
A British university that offers part-time online and distance courses for adults, often without usual entry rules
- Specialized
A fabric with threads placed far apart so small holes let light and air through
A way of allowing foreign companies to trade on the same terms as local companies
- Specialized
A common eye disease that slowly reduces side vision when eye fluid cannot drain
- Specialized
A set of numbers between two points that does not include the end points
- Specialized
Soldiers standing with wide spaces between ranks so an officer can walk between them for inspection
- Specialized
A borrowing plan that lets you borrow up to a set limit and use it again as you repay
- Specialized
A company that sells and buys back shares any time at a price based on its assets
- Archaic
A large hot oven that makes steel by heating metal on a shallow bed with flames above
- Archaic
A way of making steel by melting iron and scrap metal in a large open furnace
Surface Forms
Etymology
Open in mathematics keeps the basic idea 'not closed', so an open interval does not include its end points. That is why the ends are left out of an open interval.