Meaning

• To make something accessible or allow for passage by moving from a shut position.

  "Turn the doorknob to open the door."

• To make (an open space, etc.) by clearing away an obstacle or obstacles, in order to allow for passage, access, or visibility.

  "He opened a path through the undergrowth."

• To bring up, broach.

  "I don't want to open that subject."

• To enter upon, begin.

  "to open a case in court, or a meeting"

• To spread; to expand into an open or loose position.

  "to open a closed fist"

• To make accessible to customers or clients.

  "I will open the shop an hour early tomorrow."

• To start (a campaign).

  "Vermont will open elk hunting season next week."

• To become open.

  "The door opened all by itself."

• To begin conducting business.

  "The shop opens at 9:00."

• To begin a side's innings as one of the first two batsmen.

• To bet before any other player has in a particular betting round in a game of poker.

  "After the first two players fold, Julie opens for $5."

• To reveal one's hand.

  "Jeff opens his hand revealing a straight flush."

• (of a file, document, etc.) To load into memory for viewing or editing.

• To disclose; to reveal; to interpret; to explain.

Meaning

• An act or instance of making or becoming open.

  "He remembered fondly the Christmas morning opening of presents."

• Something that is open.

  "A salamander darted out of an opening in the rocks."

• An act or instance of beginning.

  "Their opening of the concert with Brass in Pocket always fires up the crowd."

• Something that is a beginning.

• A vacant position, especially in an array.

  "Are there likely to be any openings on the Supreme Court in the next four years?"

• An opportunity, as in a competitive activity.

• In mathematical morphology, the dilation of the erosion of a set.

Meaning

• Pertaining to the start or beginning of a series of events.

  "The opening theme of Beethoven's Fifth Symphony is, perhaps, the most recognizable in all of European art music."

• Describing the first period of play, usually up to the fall of the first wicket; describing a batsman who opens the innings or a bowler who opens the attack