1.To make or set open; to render free of access; to unclose; to unbar; to unlock; to remove any fastening or covering from; as, to open a door; to open a box; to open a room; to open a letter. "And all the windows of my heart I open to the day."
2.To spread; to expand; as, to open the hand.
3.To disclose; to reveal; to interpret; to explain. "The king opened himself to some of his council, that he was sorry for the earl's death." "Unto thee have I opened my cause." "While he opened to us the Scriptures."
4.To make known; to discover; also, to render available or accessible for settlements, trade, etc. "The English did adventure far for to open the North parts of America."
5.To enter upon; to begin; as, to open a discussion; to open fire upon an enemy; to open trade, or correspondence; to open an investigation; to open a case in court, or a meeting.
6.To loosen or make less compact; as, to open matted cotton by separating the fibers.
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