The Commens Dictionary
Quote from ‘Prag [R]’
A concept […] is a mental sign, and as such, is an intermediary whereby the object that it represents into some sort of correspondence with which it is moulded, can come to determine that effect, that meaning, which the sign itself is intended to awaken or otherwise determine.
MS [R] 322:9
‘Concept’ (pub. 19.10.15-16:33). 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-prag-r-3.