Comprehensive in scope or extent.
expansive research work
Talkative and sociable.
Able to be expanded.
The Elastick or expansive faculty of the Air, whereby it dilates itself, when compressed (indeed this lower Region of it by reason of the weight of the superincumbent is al∣ways in a compressed State) hath been made use of in the common Weather-glasses, in Wind guns, and in several ingenious Water∣works, and doubtless hath a great Interest in many natural Effects and Operations.
From Latin expāns-, past-participle stem of expandere (“to spread out”; see expand) + -ive.
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