n. 开口；开幕；走向世界；空缺（opening的复数）

n an open or empty space in or between things

n a ceremony accompanying the start of some enterprise

n becoming open or being made open

n the first performance (as of a theatrical production)

n the act of opening something

n opportunity especially for employment or promotion

n the initial part of the introduction

n a possible alternative

n an aperture or hole that opens into a bodily cavity

n a vacant or unobstructed space that is man-made

n an entrance equipped with a hatch; especially a passageway between decks of a ship

n a recognized sequence of moves at the beginning of a game of chess

n the first of a series of actions

v cause to open or to become open

v start to operate or function or cause to start operating or functioning

v become open

v begin or set in action, of meetings, speeches, recitals, etc.

v spread out or open from a closed or folded state

v make available

v become available

v have an opening or passage or outlet

v make the opening move

v afford access to

v display the contents of a file or start an application as on a computer