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

• semidarkness
• semidesert
• semidetached
• semidiameter
• semiempirical
• semiepiphyte
• semifinal
• semifinalist
• semifluid
• semifluidity
• semiformal
• semigloss
• semihard
• semiliquid
• semiliterate
• semilunar
• semilunar bone
• semilunar cartilage
• semilunar valve
• semimajor axis
• semiminor axis
• semimonthly
• seminal
• seminal duct
• seminal fluid