Definitions for "Extemporize"
To speak extempore; especially, to discourse without special preparation; to make an offhand address.
To do, make, or utter extempore or off-hand; to prepare in great haste, under urgent necessity, or with scanty or unsuitable materials; as, to extemporize a dinner, a costume, etc.
perform without preparation; "he extemporized a speech at the wedding"
manage in a makeshift way; do with whatever is at hand; "after the hurricane destroyed our house, we had to improvise for weeks"