Definition of "indexical"
adjective
comparative more indexical, superlative most indexical
(linguistics, philosophy) Having or imparting a meaning, or signifying a referent, that changes according to context.
Quotations
In order that they might represent the worlds of experience and imagination, such symbols have to be put together with ‘indexical’ signs, as Peirce termed them, such as articles (the, some), demonstratives (this, those), tense-inflections (walk-s, walk-ed), moods (may/might walk, shall/should walk) etc.
2012, Michael Silverstein, “The [] walked down the street”, in London Review of Books, volume 34, number 21
(linguistics, philosophy) An indexical term.
Quotations
So even with indexicals, there is a Sinn for every meaning.
2007 August 15, Wayne A. Davis, “Replies to Green, Szabó, Jeshion, and Siebel”, in Philosophical Studies, volume 137, number 3