from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Troublesome or oppressive; burdensome. See Synonyms at burdensome.
- adj. Law Entailing obligations that exceed advantages.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. imposing or constituting a physical, mental, or figurative load which can be borne only with effort.
from the GNU version of the Collaborative International Dictionary of English
- adj. Burdensome; oppressive.
from The Century Dictionary and Cyclopedia
- Burdensome; oppressive.
- In Scots law, imposing a burden in return for an advantage; being for a consideration: as, an onerous contract: opposed to gratuitous.
- Synonyms 1. Heavy, weighty, toilsome.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. not easily borne; wearing
Middle English, from Old French onereus, from Latin onerōsus, from onus, oner-, burden.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin onerosus ("burdensome"), from onus ("load"). (Wiktionary)