1. With little or no preparation or forethought
   "a few unrehearsed comments"
   - ad-lib, extemporaneous, extemporary, extempore, impromptu, offhand, offhanded, off-the-cuff

See also: unprepared

• postgraduate
• posthitis
• posthole
• posthouse
• posthumous
• posthumous birth
• posthumously
• posthypnotic amnesia
• posthypnotic suggestion
• postiche
• postictal
• postie
• postilion
• postillion
• postindustrial
• posting
• postlude
• postman
• postmark
• postmaster
• postmaster general
• postmature infant
• postmenopausal
• postmeridian
• postmillennial