- (of a reciprocating engine, pump, etc.) having pistons accomplishing work in both directions, fluid being admitted alternately to opposite ends of the cylinders.Compare single-acting.
- (of a hinge of a door or the like) permitting movement in either direction from the normal, or closed, position.
- having twice the usual effectiveness, strength, use, etc.
Origin of double-acting
First recorded in 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for double-acting
To each crane is fixed a 10-inch cylinder, 20-inch stroke, double-acting.Life of Richard Trevithick, Volume II (of 2)
This company substituted a double-acting pump early in 1910.The Wonder Book of Knowledge
The new cylinder that he invented to attach to this working-frame was double-acting.Automobile Biographies
Lyman Horace Weeks
E is the steam-cylinder, and F the pump, which is seen to be double-acting.A History of the Growth of the Steam-Engine
Robert H. Thurston
This differs from the one just described chiefly in that it is single-acting, while the other is double-acting.
- (of a reciprocating engine or pump) having a piston or pistons that are pressurized alternately on opposite sidesCompare single-acting
- (of a hinge, door, etc) having complementary actions in opposed directions
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012