"Come hither" is an old-fashioned phrase that means "come here" or "approach me." It is a directive for someone to move closer to the speaker.
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"Hither" describes the directionality of motion and means
"toward here". "Come hither" is nowadays more commonly said "come
here" although what is meant is "come toward here" or "come in this
direction".
A "come hither motion" is therefore a gesture indicating that
someone should come towards you.
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'hither' means 'to or toward this place'
Thus a sentence using 'hither' could be:-
There are blueberries ripe in the woods, go hither and gather
them for me.