Bulk out

verb

Definitions

Verb
  1. 1
    To become thicker, fatter or more bulky. intransitive
  2. 2
    To cause to be thicker, fatter or more bulky. transitive
  3. 3
    To become more substantial intransitive
  4. 4
    To cause to be more substantial; to add substance to. transitive

    "The pet food was made from meat bulked out with rusk."

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