acting by itself; automatic.

Origin of self-acting

First recorded in 1670–80
Related formsself-ac·tion, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for self-acting

Historical Examples of self-acting

  • I suppose the machine is not self-acting, and that he knew that before he came here.'

    Roland Cashel

    Charles James Lever

  • As a self-acting dispenser of gratuitous counsel he was immense.

    Days in the Open

    Lathan A. Crandall

  • He who is self-acting out of the fulness of His power, is the author of a deed, no other.

  • It is this which constitutes person, or the self-acting ego.


    Joseph Le Conte

  • Is it a thing which exists and is self-acting like the cholera?

British Dictionary definitions for self-acting



not requiring an external influence or control to function; automatic
Derived Formsself-action, noun
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