1. draftproof - Adjective
2. draftproof - Verb
draftproof (comparative more draftproof, superlative most draftproof)
US standard spelling of draughtproof.
draftproof (third-person singular simple present draftproofs, present participle draftproofing, simple past and past participle draftproofed)
US standard spelling of draughtproof.