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

See also: inconsiderate, unloving

• murmuring
• murmurous
• Muroidea
• murphy
• Murphy bed
• Murphy's Law
• murrain
• Murray
• Murray Gell-Mann
• Murray River
• murre
• murrelet
• murrey
• Murrow
• Murrumbidgee
• Murrumbidgee River
• Mus
• Mus musculus
• mus rose
• Musa
• Musa acuminata
• Musa basjoo
• Musa ensete
• Musa paradisiaca
• Musa paradisiaca sapientum