perforce UK /pəˈfɔːs/US /pɚˈfɔɹs/adverb 2verb 1forms 3 adverb2 •By constraint of circumstances; of necessity; as a matter of course.Mr. Wickham's happiness and her own were perforce delayed a little longer, and Mr. Collins's proposal accepted with as good a grace as she could.. — 1813 •(no longer used) By force.If she denie, Lord Hastings goe with him, And from her iealous Armes pluck him perforce. — 1593 verb1 •(no longer used) To force; to compel. formsperforced · perforcing · perforces