The American Heritage® Dictionary of the English Language, 4th Edition
adj. Not to be avoided or escaped; inevitable: "Those war plans rested on a belief in the ineluctable superiority of the offense over the defense” ( Jack Beatty).
adj. Impossible to avoid or escape; inescapable, irresistible.
the GNU version of the Collaborative International Dictionary of English
adj. Not to be overcome by struggling; irresistible; inescapable; inevitable.
The Century Dictionary and Cyclopedia
Not to be overcome or escaped from.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. impossible to avoid or evade:
Word Usage
"ROME—Italy's business elite Friday demanded rapid and bold action by the government to avoid what they called an "ineluctable slide into economic and social decline.""