1. Lacking affection or warm feeling
   "an uncaring person"
   - detached, unaffectionate 
2. Without care or thought for others
   - thoughtless, unthinking

See also: inconsiderate, unloving

• smart-arse
• smart-ass
• smarta
• smarten
• smarten up
• smartie
• smarting
• smartly
• smartness
• smartphone
• smarts
• smarty
• smartypants
• smash
• smash hit
• smash-and-grab
• smash-up
• smashed
• smasher
• smashing
• smashingly
• smatter
• smattering
• SME
• smear