[ loh-gee ]
/ ˈloʊ gi /

adjective, lo·gi·er, lo·gi·est.

lacking physical or mental energy or vitality; sluggish; dull; lethargic.

Nearby words

  1. logroll,
  2. logrolling,
  3. logroño,
  4. logway,
  5. logwood,
  6. lohan,
  7. lohengrin,
  8. loiasis,
  9. loid,
  10. loimic

Origin of logy

1840–50, Americanism; perhaps < Dutch log heavy, cumbersome + -y1

Related formslo·gi·ly, adverblo·gi·ness, noun


a combining form used in the names of sciences or bodies of knowledge: paleontology; theology.
a termination of nouns referring to writing, discourses, collections, etc.: trilogy; martyrology.

Origin of -logy

Middle English -logie < Latin -logia < Greek. See -logue, -y3

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for logy

British Dictionary definitions for logy


/ (ˈləʊɡɪ) /

adjective logier or logiest

mainly US dull or listless
Derived Formsloginess, noun

Word Origin for logy

C19: perhaps from Dutch log heavy


n combining form

indicating the science or study ofmusicology
indicating writing, discourse, or body of writingstrilogy; phraseology; martyrology
Derived Forms-logical or -logic, adj combining form-logist, n combining form

Word Origin for -logy

from Latin -logia, from Greek, from logos word; see logos

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

Word Origin and History for logy
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for logy



Science; theory; study:dermatology.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.