1. Stimulating interest or thought
   "a thought-provoking book"
   - challenging

See also: stimulating

• fixative
• fixed
• fixed assets
• fixed charge
• fixed cost
• fixed costs
• fixed disk
• fixed intonation
• fixed investment trust
• fixed oil
• fixed phagocyte
• fixed star
• fixed storage
• fixed-combination drug
• fixed-cycle operation
• fixed-point notation
• fixed-point number
• fixed-point part
• fixed-point representation system
• fixed-width font
• fixedly
• fixedness
• fixer
• fixer-upper
• fixing