The Commens Dictionary
Quote from ‘Foundations of Mathematics [R]’
If a sign is apt to represent many things, the option as to what single thing it shall be taken to represent may be reserved by the utterer of it, to whom it naturally belongs; in which case it may be said to be used vaguely, or not definitely.
MS [R] 9:2
‘Vague’ (pub. 21.08.17-09:09). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/entry/quote-foundations-mathematics-r-4.