eta

noun3

1. •
   The seventh letter of the Modern Greek alphabet, the eighth in Old Greek.
2. •
   A kind of electrically neutral meson having zero spin and isospin.
3. •
   A social outcast in Japan who is subjected to menial work, making up a class or caste of such people.

noun3

1. •
   Initialism of estimated time of arrival.

   • We're even, as long as we're only counting today. Kilo 023, what's your ETA? — 2007
2. •
   Initialism of Electronic Travel Authorization, a type of electronic visa.
3. •
   Initialism of Elvis tribute artist, a professional impersonator who performs as Elvis Presley.

verb1

1. •
   (Internet) Initialism of edited to add.