1. Not belonging to or having been expelled from a caste and thus having no place or status in society
   "the foreigner was a casteless person"
   - outcaste

See also: unwanted

• osteomyelitis
• osteopath
• osteopathic
• osteopathist
• osteopathy
• osteopetrosis
• osteophyte
• osteoplasty
• osteoporosis
• osteosarcoma
• osteosclerosis
• osteosclerosis congenita
• osteostracan
• Osteostraci
• osteotomy
• ostiarius
• ostiary
• ostinato
• ostiole
• ostium
• ostler
• Ostmark
• ostomy
• Ostraciidae
• ostracise