What is the meaning of the word "backing"?

Definitions:

  1. financial resources provided to make some project possible copy to clipboard noun
    • With your backing, we can open this restaurant within three months. copy to clipboard
  2. something forming a back that is added for strengthening copy to clipboard noun
    • This shelf has a weak backing. copy to clipboard
  3. the act of providing approval and support copy to clipboard noun
    • Their vigorous backing of the conservatives got them in trouble with progressives. copy to clipboard

Synonyms: