from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, causing, or characterized by lethargy.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. sluggish, slow
- adj. indifferent, apathetic
from the GNU version of the Collaborative International Dictionary of English
- adj. Pertaining to, affected with, or resembling, lethargy; morbidly drowsy; dull; heavy.
from The Century Dictionary and Cyclopedia
- Affected with lethargy; morbidly sluggish or drowsy; dull; torpid.
- Marked by lethargy or languor; manifesting sluggishness or apathy: as, lethargic movements; a lethargic government.
- Producing lethargy; causing languor or apathy; stupefying.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. deficient in alertness or activity
From Ancient Greek ληθαργικός (lethargikos), from λήθαργος (lēthargos, "forgetful, lethargic"), from λήθη (lēthē, "a forgetting, forgetfulness") (from which Lethe ("river in Hades")) + ἀργός (argos, "not working") (Wiktionary)