| ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ adjective
: marked by thoroughness or zeal : going the full length : thorough , extreme
the most thoroughgoing democrat of his generation — V.L.Parrington
reconstruction will require thoroughgoing cooperation between industry and labor — F.D.Roosevelt
• thor·ough·go·ing·ly adverb
• thor·ough·go·ing·ness noun -es