Meaning of RE in English

I. noun

or ray ˈrā

( -s )

Etymology: Medieval Latin re, from Latin re sonare to resound, a word sung to this note in a medieval hymn to St. John the Baptist

1. : the second tone of the diatonic scale in solmization

2. : the tone D in the fixed-do system

II. ˈrā, ˈrē preposition

Etymology: Latin, abl of res thing, affair, matter — more at real

: with regard to : regarding : in the matter of : on the subject of : concerning : in re

their remarks re the new building were most interesting

re your letter of last month

III. abbreviation

1. reference

2. rupee

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.