1. Not prepared or planned in advance
   "asked an unpremeditated question" 
2. Not premeditated

See also: impulsive, unplanned

Antonym: premeditated

• capitalism
• capitalist
• capitalist economy
• capitalistic
• capitalization
• capitalize
• capitally
• capitate
• capitate bone
• capitation
• capitol
• Capitol Building
• Capitol Hill
• Capitol Reef National Park
• Capitonidae
• capitular
• capitulary
• capitulate
• capitulation
• capitulum
• capiz
• caplet
• caplin
• capo
• capon