| noun | an open or empty space in or between things “there was a small opening between the trees” |
| noun | a ceremony accompanying the start of some enterprise |
| noun | becoming open or being made open “the opening of his arms was the sign I was waiting for” |
| noun | the first performance (as of a theatrical production) “the opening received good critical reviews” |
| noun | the act of opening something “the ray of light revealed his cautious opening of the door” |
| noun | opportunity especially for employment or promotion “there is an opening in the sales department” |
| noun | the initial part of the introduction “the opening established the basic theme” |
| noun | a possible alternative “bankruptcy is always a possibility” |
| noun | an aperture or hole that opens into a bodily cavity “the orifice into the aorta from the lower left chamber of the heart” |
| noun | a vacant or unobstructed space that is man-made “they left a small opening for the cat at the bottom of the door” |
| noun | an entrance equipped with a hatch; especially a passageway between decks of a ship |
| noun | a recognized sequence of moves at the beginning of a game of chess “he memorized all the important chess openings” |
| noun | the first of a series of actions |
| verb | cause to open or to become open “Mary opened the car door” |
| verb | start to operate or function or cause to start operating or functioning “open a business” |
| verb | become open “The door opened” |
| verb | begin or set in action, of meetings, speeches, recitals, etc. “He opened the meeting with a long speech” |
| verb | spread out or open from a closed or folded state “open the map” |
| verb | make available “This opens up new possibilities” |
| verb | become available “an opportunity opened up” |
| verb | have an opening or passage or outlet “The bedrooms open into the hall” |
| verb | make the opening move “Kasparov opened with a standard opening” |
| verb | afford access to “the door opens to the patio” |
| verb | display the contents of a file or start an application as on a computer |
| adjective | first or beginning “the memorable opening bars of Beethoven's Fifth” |
| open | verb | have an opening or passage or outlet |
| gap | verb | make an opening or gap in |
| opening | adjective | first or beginning |
| possible | adjective | existing in possibility |
| opener | noun | a person who unfastens or unwraps or opens |
| opening | noun | becoming open or being made open |
| open | noun | information that has become public |