What is a deictic center?

Definition
	A deictic center is a reference point in relation to which a deictic expression is to be interpreted.

Discussion
	The deictic center is most typically the present time, location, participant role, and so forth of the speaker.

Examples (English)
	In the following example, the speaker, the actual location and the actual time of the utterance are, respectively, the deictic centers for the interpretation of I, here, and now: I’m over here now.