1. plural of eta, the seventh letter of the Greek alphabet
2. plural of ETA, estimated times of arrival
Usage: abbreviation

Examples

• The professor wrote several etas on the blackboard during the Greek alphabet lesson.
• Students practiced writing both uppercase and lowercase etas in their notebooks.
• The flight board displayed updated ETAs for all incoming flights.
• We need to calculate the ETAs for each delivery truck.
• The shipping company provided ETAs for all packages in transit.
• Air traffic control monitors the ETAs of aircraft approaching the airport.