adj. Having the same spatial limits or boundaries; sharing the same area.
adj. Occurring over the same period of time; contemporaneous.
adj. Having the same extension—the object or set of objects to which a term refers.
the GNU version of the Collaborative International Dictionary of English
adj. Equally extensive; having equal extent.
The Century Dictionary and Cyclopedia
Having the same extension.
Occupying the same extent of space or duration of time.
In logic, having the same breadth, or logical extension.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. being of equal extent or scope or duration
Word Usage
"If so, then reports of what a compass indicates exhibit one of Chisholm's features of intensionality, namely coextensive terms are not freely substituable salva veritate in such reports."