Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Having, permitting, or indicating passage in four directions.
  • adjective Having four participants or ingredients.

from The Century Dictionary.

  • Of or pertaining to four ways or passages.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Allowing passage in either of four directions.
  • adjective a cock connected with four pipes or ports, and having two or more passages in the plug, by which the adjacent pipes or ports may be made to communicate; formerly used as a valve in the steam engine, and now for various other purposes. In the illustration, a leads to the upper end of a steam engine cylinder, and b to the lower end; c is the steam pipe, and d the exhaust pipe.

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