verb (used with object), pas·si·vat·ed, pas·si·vat·ing. Metallurgy.
to treat (a metal) to render the surface less reactive chemically.
- passive anaphylaxis,
- passive clot,
- passive congestion,
- passive euthanasia
Origin of passivate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(tr) to render (a metal) less susceptible to corrosion by coating the surface with a substance, such as an oxide
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