Definition of "all the more"

all the more

adverb
not comparable
1. Even more; notably, but even more notably due to additional information, either preceding or following the statement.
  Quotations
  London was startled by a crime of singular ferocity and rendered all the more notable by the high position of the victim.
  1886 January 5, Robert Louis Stevenson, Strange Case of Dr Jekyll and Mr Hyde, London: Longmans, Green, and Co.
  Stripped of all bravado, Cersei breaks, and shows the very scared, vulnerable woman who has kept her emotions at bay. “I don’t want to die,” she whimpers, “Not like this.” It’s all the more moving for coming from a character who built her identity on steely resolve and contempt for such hoary conceits as fear.
  2019 May 12, Alex McLevy, “Westeros faces a disastrous final battle on the penultimate Game of Thrones (newbies)”, in The A.V. Club‎