1. Declare invalid
   "The contract was annulled"
   - invalidate, quash, void, avoid, nullify 
2. Cancel officially
   - revoke, lift, countermand, reverse, repeal, overturn, rescind, vacate

Derived forms: annuls, annulling, annulled

See also: annulment

Type of: cancel, strike down

Encyclopedia: Annul

• impaction
• impair
• impaired
• impairer
• impairment
• impala
• impala lily
• impale
• impalement
• impalpability
• impalpable
• impalpably
• impanel
• imparipinnate
• imparity
• impart
• impartation
• impartial
• impartiality
• impartially
• imparting
• impassable
• impasse
• impassibility
• impassible