from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To cover with ice or a glacier.
- transitive v. To subject to or affect by glacial action.
- transitive v. To freeze.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To cover with ice or a glacier
- v. To erode with a glacier
- v. To freeze
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. To turn to ice.
- transitive v. To convert into, or cover with, ice.
- transitive v. To produce glacial effects upon, as in the scoring of rocks, transportation of loose material, etc.
from The Century Dictionary and Cyclopedia
- To convert into ice.
- To cover with ice.
- To give an ice-like or frosted appearance to.
- To be converted into ice.
- To act upon by a glacier.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. become frozen and covered with glaciers
- v. cover with ice or snow or a glacier
They show that when the world began to glaciate at the start of the Ice Age about 35 million years ago, the concentration of CO2 in the atmosphere stood at about 450ppm.