Noun

• S: (n) apology (an expression of regret at having caused trouble for someone) "he wrote a letter of apology to the hostess"
• direct hypernym / inherited hypernym / sister term
• S: (n) acknowledgment, acknowledgement (a statement acknowledging something or someone) "she must have seen him but she gave no sign of acknowledgment"; "the preface contained an acknowledgment of those who had helped her"
• derivationally related form
• S: (n) apology, apologia (a formal written defense of something you believe in strongly)
• S: (n) apology, excuse (a poor example) "it was an apology for a meal"; "a poor excuse for an automobile"