the GNU version of the Collaborative International Dictionary of English
v. To remove the frost or ice from.
verb-intransitive. To become free of frost or ice.
verb-intransitive. To thaw; -- used especially of items removed from a freezer, such as frozen foods.
The Century Dictionary and Cyclopedia
To remove the effects of frost or freezing from; restore to a sound unfrozen condition or state.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. make or become free of frost or ice
Word Usage
"For this, perhaps you mean season 8 episode "New Order" when they "defrost" Jack and he sees that Teal'c has hair and he starts asking "Teal'c, what's with the hair?""