What is the meaning of the word "a fortiori"?

Definitions:

  1. Used to express a conclusion for which there is a stronger evidence than for a previously accepted one. copy to clipboard ADVERB
    • A fortiori, reading the recommended textbooks will help improve your performance in exams. copy to clipboard
  2. with greater reason copy to clipboard adverb
    • A fortiori, attending all lectures is essential for a better understanding of the subject matter. copy to clipboard

Synonyms: