re (Noun) — (antiquity) ancient Egyptian sun god with the head of a hawk; a universal creator; he merged with the god Amen as Amen-Ra to become the king of the gods.
re (Noun) — A rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum.
re (Noun) — The syllable naming the second (supertonic) note of any major scale in solmization.
re (Prefix) — Again, anew.
re (Preposition) — With regard or relation to; on the subject of. ex. "I have a query re your previous reply"