defence

See Defense.

The noun has 10 meanings:

Meaning #1: (psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires
  Synonyms: defense mechanism, defense reaction, defence mechanism, defence reaction, defense

Meaning #2: the team that is trying to prevent the other team from scoring
  Synonyms: defense, defending team
  Antonym: offence (meaning #2)

Meaning #3: the defendant and his legal advisors collectively
  Synonyms: defense, defense team, defense lawyers

Meaning #4: an organization of defenders that provides resistance against attack
  Synonyms: defense, defense force, defence force

Meaning #5: the speech act of answering an attack on your assertions
  Synonyms: refutation, defense

Meaning #6: the justification for some act or belief
  Synonyms: defense, vindication

Meaning #7: a structure used for defense
  Synonyms: defensive structure, defense

Meaning #8: a defendant's answer or plea denying the truth of the charges against him
  Synonyms: defense, denial, demurrer

Meaning #9: military action or resources protecting a country against potential enemies
  Synonyms: defense, defensive measure

Meaning #10: protection from harm
  Synonym: defense