1. A factor in a given situation whose bearing and importance is not apparent
   "I don't know what the new man will do; he's still an unknown quantity" 
2. A variable whose values are solutions of an equation
   - unknown

Derived forms: unknown quantities

Type of: factor, variable

• self-centeredness
• self-centred
• self-centredness
• self-collected
• self-colored
• self-coloured
• self-command
• self-complacency
• self-complacent
• self-conceit
• self-conceited
• self-conceitedly
• self-concern
• self-condemnation
• self-confessed
• self-confidence
• self-confident
• self-confidently
• self-congratulation
• self-congratulatory
• self-conscious
• self-consciously
• self-consciousness
• self-consistent
• self-constituted