Longman Dictionary of Contemporary English homepage

Topic: EARTH SCIENCES

Date: 800-900
Language: Old French
Origin: mantel, from Latin mantellum 'cloak'

mantle

1 noun
     
man‧tle1
1

take on/assume/wear the mantle of something

formal to accept or have an important duty or job:
It is up to Europe to take on the mantle of leadership in environmental issues.
2

a mantle of snow/darkness etc

literary something such as snow or darkness that covers a surface or area:
A mantle of snow lay on the trees.
3 [countable]DCC a loose piece of outer clothing without sleeves, worn especially in former times
4 [countable]DT a cover that is put over the flame of a gas or oil lamp to make it shine more brightly
5 [singular] technicalHE the part of the Earth around the central core
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