Definition of "open" []

• Affording unobstructed entrance and exit; not shut or closed. (adjective)
• Affording unobstructed passage or view: open waters; the open countryside. (adjective)
• Having no protecting or concealing cover: an open wound; an open sports car. (adjective)
• Completely obvious; blatant: open disregard of the law. (adjective)
• Carried on in full view: open warfare; open family strife. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "When Jesus said that heaven would be opened, He meant not only opened just once, but _remaining open_; so that ever since Christ ascended into heaven we have lived and are still living under an "open heaven," which means free intercourse between God and man, because Christ Himself is the"
• "And if the parasite can, as some of our peasants believe, open all locks, why should it not have served as an “open Sesame” in the hands of Aeneas to unlock the gates of death?"
• "In a flute, open at both ends, the holes are so arranged that the length of the sound-wave is about one foot, for one of the chief “open notes."