1. Large in number or quantity (especially of discourse)
   "she took copious notes"
   - voluminous 
2. Affording an abundant supply
   "copious provisions"
   - ample, plenteous, plentiful, rich

See also: abundant, copiously, copiousness

• oarsman
• oarsmanship
• oarswoman
• OAS
• oasis
• oast
• oast house
• oat
• oat cell carcinoma
• oat grass
• oatcake
• oaten
• Oates
• oath
• oatmeal
• oatmeal cookie
• Oaxaca
• Oaxaca de Juarez
• Ob
• Ob River
• ob-gyn
• Obadiah
• Obama
• obbligato
• obconic