here

(noun): (abstract) This place; this location.
(noun): (abstract) This time, the present situation.
(adjective): Filler after a noun or demonstrative pronoun, solely for emphasis.
(adjective): Filler after a demonstrative pronoun but before the noun it modifies, solely for emphasis.
(adverb): (location) In, on, or at this place.
(adverb): (location) To this place; used in place of the more dated hither.
(adverb): (abstract) In this context.
(adverb): At this point in the argument, narration, or other, usually written, work.
(interjection): Used semi-assertively to offer something to the listener.
(interjection): Used for emphasis at the beginning of a sentence when expressing an opinion or want.

An Alzheimer patient's here may in his mind be anywhere he called home in the time he presently re-lives.
John here is a rascal.
This here orange is too sour.
Flu season is here.
Please come here.