Meaning Estimated time of arrival
Type Acronym
Popularity ★ ★ ★ ★ ★  Popular
Usage General (not just online)

ETA means estimated time of arrival. It is an acronym used as a quick way to say when you plan on arriving at a certain location.

The acronym is especially helpful for giving a quick update via text message of when you think you will arrive. You can use it to tell friends or family when you think you'll make it to their house, a movie theater, a restaurant, a beach, or other meeting place.

Updated June 30, 2016
Meaning Edited to add
Type Acronym
Popularity ★ ★ ☆ ☆ ☆  Uncommon
Usage Online Only (chat, messaging, e-mail)

Means something has been edited before being added, possibly for censorship or privacy reasons.

Updated December 16, 2013
Information from PC.net