1. Being one more than twenty
   - twenty-one, 21

1. The cardinal number that is the sum of twenty and one
   - twenty-one, 21

See also: cardinal

Type of: large integer

Encyclopedia: XXI

• silky-leaved
• sill
• sillabub
• Sillaginidae
• Sillago
• sillcock
• sillily
• silliness
• sillock
• Sills
• silly
• silly billy
• silly season
• silo
• siloxane
• Silphium
• Silphium laciniatum
• silt
• silt up
• siltstone
• silty
• Silurian
• Silurian period
• silurid
• silurid fish