American Heritage Dictionary
(8)
Century Dictionary
(25)
GNU Webster's 1913
(2)
WordNet
(6)
Elsewhere on the web
Even today, by reason of its choosing to assert the primacy of reason, Christianity remains 'enlightened,' and I think that any enlightenment that cancels this choice must, contrary to all appearances, mean not an evolution but an involution, a shrinking of enlightenment ...
It will be seen that at least opium did not move me to seek solitude, and much less to seek inactivity, or the torpid state of self- involution ascribed to the Turks.— Confessions of an English Opium-Eater
Nothing should be done for them, indeed they should be welcomed, for their presence means good involution (contraction) of the uterus THE TEMPERATURE Careful notations of the temperature should be made during the first week.— The Mother and Her Child
That degeneration may set in is an awful possibility--involution rather than evolution--but even if going back became for a time the rule, we cannot give up the hope that the race would recover itself and begin afresh to go forward.— The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told

American Heritage Dictionary (1)
Century Dictionary (1)
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