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Definition of passage
1the act or process of moving through, under, over, or past something on the way from one place to another:there were moorings for boats wanting passage through the lock the act or process of moving forward:despite the passage of time she still loved him the right to pass through somewhere:we obtained a permit for safe passage from the embassy a journey or ticket for a journey by sea or air:he then booked passage home aboard a Spanish warship Ornithology (of a migrating bird) the action of passing through a place en route to its final destination:the species occurs regularly on passage [as modifier]:a passage migrant Medicine
& Biology the process of propagating microorganisms or cells in a series of host organisms or culture media, so as to maintain them or modify their virulence.
2a narrow way, typically having walls on either side, allowing access between buildings or to different rooms within a building; a passageway. a duct, vessel, or other channel in the body. 3the process of transition from one state to another:an allegory on the theme of the passage from ignorance to knowledge the passing of a bill into law:a catalyst for the unrest was the passage of a privatization law 4a short extract from a book or other printed material:he picked up the newspaper and read the passage again a section of a piece of music:nothing obscures the outlines of an orchestral passage more than a drumroll on an unrelated note an episode in a longer activity such as a sporting event:a neat passage of midfield play
verb [with object] Medicine & Biology
subject (a strain of microorganisms or cells) to a passage:each recombinant virus was passaged nine times successively