Meaning

noun the present time or age

noun the day that includes the present moment (as opposed to yesterday or tomorrow)

adverb in these times; - Nancy Mitford

originFrom Middle English today, to-daie, todæig, from Old English tōdæġ, tō dæġe (“today”, literally “on [the/this] day, [this] day forward”), equivalent to to + day. Compare Saterland Frisian däälich (“today”), Dutch vandaag (“today”), Old Saxon hindag (“today”, literally “[this] day forward”), German Low German vandage, vandaag (“today”), Swedish i dag, idag (“today”).

Etymology from Wiktionary, CC BY-SA 3.0