exculpation
1. [ noun ] a defense of some offensive behavior or some failure to keep a promise etc.
Synonyms: excuse self-justification alibi
Examples:

"he kept finding excuses to stay" "every day he had a new alibi for not getting a job" "his transparent self-justification was unacceptable"

Related terms: defense extenuation excuse excuse alibi
2. [ noun ] the act of freeing from guilt or blame
Related terms: forgiveness acquit
Similar spelling:   exculpate
  exculpated
  exculpatory