apology
1. [ noun ] an expression of regret at having caused trouble for someone
Examples:

"he wrote a letter of apology to the hostess"

Related terms: acknowledgment apologize
2. [ noun ] a formal written defense of something you believe in strongly
Synonyms: apologia
Related terms: defense apologize
3. [ noun ] a poor example
Synonyms: excuse
Examples:

"it was an apology for a meal" "a poor excuse for an automobile"

Related terms: example
Similar spelling:   apologue
  apologia
  apologize
  apologist
  apologise
  apologetic
  Aplysia
  Applegate
  Appaloosa