Noun groundwork has 3 senses
  1. basis, base, foundation, fundament, groundwork, cornerstone - the fundamental assumptions from which something is begun or developed or calculated or explained; "the whole argument rested on a basis of conjecture"
    --1 is a kind of assumption, supposition, supposal
    --1 is a part of explanation
    --1 has particulars: meat and potatoes
  2. foundation, base, fundament, foot, groundwork, substructure, understructure - lowest support of a structure; "it was built on a base of solid rock"; "he stood at the foot of the tower"
    --2 is a kind of support
    --2 is a part of structure, construction
    --2 has particulars: bed; raft foundation
  3. groundwork - preliminary preparation as a basis or foundation; "we are prepared today because of groundwork that was done ten years ago"
    --3 is a kind of
    preparation, readying