supplementary Meaning, Definition & Usage

  1. adjective satellite functioning in a supporting capacity
    subsidiary; auxiliary; supplemental.
    • the main library and its auxiliary branches
  2. adjective satellite added to complete or make up a deficiency
    supplemental.
    • produced supplementary volumes

WordNet

Sup`ple*men"tal, Sup`ple*men"ta*ry adjective (Also<
  • Supplemental
  • Supplementary
)
Etymology
Cf. F. supplémentaire.
Definitions
  1. Added to supply what is wanted; additional; being, or serving as, a supplement; as, a supplemental law; a supplementary sheet or volume.

Webster 1913