a recognized sequence of moves at the beginning of a game of chess | oval or circular opening; to allow light into a dome or vault |
the act of opening something | temporary fortification like a detached bastion |
becoming open or being made open | |
the first of a series of actions | |
a vacant or unobstructed space that is man-made | |
an entrance equipped with a hatch; especially a passageway between decks of a ship | |
an aperture or hole that opens into a bodily cavity | |
a possible alternative | |
the initial part of the introduction | |
the first performance (as of a theatrical production) | |
a ceremony accompanying the start of some enterprise | |
an open or empty space in or between things | |
opportunity especially for employment or promotion | |