1. A writer of dialogues 
2. A speaker in a dialogue

Derived forms: dialogists

• c-note
• c-number
• C-ration
• C-reactive protein
• C-section
• C. D. Gibson
• C. diphtheriae
• C. H. Best
• C. K. Ogden
• C. Northcote Parkinson
• C. P. Snow
• C. psittaci
• C. S. Forester
• C. S. Lewis
• C. trachomatis
• C. Vann Woodward
• C. W. Post
• C2H6
• Ca
• ca-ca
• Caaba
• cab
• cab fare
• cabal
• cabala