Un*com"mon (?), a. Not common; unusual; infrequent; rare; hence, remarkable; strange; as, an uncommon season; an uncommon degree of cold or heat; uncommon courage.

Syn. -- Rare; scarce; infrequent; unwonted.

-- Un*com"mon*ly, adv. -- Un*com"mon*ness, n.

Un*com"mon (?), a. Not common; unusual; infrequent; rare; hence, remarkable; strange; as, an uncommon season; an uncommon degree of cold or heat; uncommon courage.

Syn. -- Rare; scarce; infrequent; unwonted.

-- Un*com"mon*ly, adv. -- Un*com"mon*ness, n.

• rare; not readily found; unusual
       Bald eagles are an uncommon sighting in this state
  
• remarkable; exceptional
       The diamond was of uncommon size
  
• extremely; exceptionally
       A common remedy is uncommonly difficult to find
  
• the degree to which something is uncommon
       The uncommonness of the gem is what defines it's value.