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skull

[skuhl] /skʌl/
noun
1.
the bony framework of the head, enclosing the brain and supporting the face; the skeleton of the head.
2.
the head as the center of knowledge and understanding; mind:
to get literature's great ideas through our skulls.
3.
Armor. the part of a helmet that covers the top of the head.
Idioms
4.
out of one's skull, Slang. crazy; demented.
Origin
1175-1225
1175-1225; Middle English scolle < Old Norse skalli
Related forms
skull-less, adjective
skull-like, adjective
Can be confused
scull, skull.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for out of their skull

skull

/skʌl/
noun
1.
the bony skeleton of the head of vertebrates See cranium related adjective cranial
2.
(often derogatory) the head regarded as the mind or intelligence: to have a dense skull
3.
a picture of a skull used to represent death or danger
Word Origin
C13: of Scandinavian origin; compare Old Norse skoltr, Norwegian skult, Swedish dialect skulle
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
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Word Origin and History for out of their skull

skull

n.

"bony framework of the head," c.1200, probably from Old Norse skalli "a bald head, skull," a general Scandinavian word (cf. Swedish skulle, Norwegian skult), probably related to Old English scealu "husk" (see shell (n.)). But early prominence in southwestern texts suggests rather origin from a Dutch or Low German cognate (e.g. Dutch schol "turf, piece of ice," but the sense of "head bone framework" is wanting). Derivation from Old French escuelle seems unlikely on grounds of sound and sense. Old English words for skull include heafod-bolla.

Online Etymology Dictionary, © 2010 Douglas Harper
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out of their skull in Medicine

skull (skŭl)
n.
The bony or cartilaginous framework of the head, made up of the bones of the braincase and face; cranium.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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out of their skull in Science
skull
  (skŭl)   
The part of the skeleton that forms the framework of the head, consisting of the bones of the cranium, which protect the brain, and the bones of the face. See more at skeleton.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for out of their skull

skivvy-waver

noun

A naval signal operator (WWII Navy) skookum

adjective

Effective; powerful

[1847+; fr Chinook jargon, ''powerful evil spirit,'' fr Chehalis skukum]


The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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