a word specifying identity or spatial or temporal location from the perspective of a speaker or hearer in the context in which the communication occurs
"words that introduce particulars of the speaker's and hearer's shared cognitive field into the message"
Such a word (such as I or here).
relating to or characteristic of a word whose reference depends on the circumstances of its use
"deictic pronouns"
Of or pertaining to deixis; to a word whose meaning is dependent on context.