n. [语](定冠词、指示代词等的)指示功能
直示(系统)

[ noun ]
the function of pointing or specifying from the perspective of a participant in an act of speech or writing; aspects of a communication whose interpretation depends on knowledge of the context in which the communication occurs
<noun.cognition>

deixis \deixis\ (d[imac]k"s[i^]s), n. (Grammar)
the function or operation of a deictic word; the function of
pointing or specifying from the perspective of a participant
in an act of speech or writing; aspects of a communication
whose interpretation depends on knowledge of the context in
which the communication occurs.
[WordNet 1.5]