eta has definitions from the field of politics
1
[ noun ] (politics) a terrorist organization organized in 1959 by student activists who were dissatisfied with the moderate nationalists of the traditional Basque party; want to create on independent homeland in Spain's western Pyrenees

Examples

"in 1968 ETA launched a campaign

2
[ noun ] the 7th letter of the Greek alphabet

Related terms

letter Greek_alphabet

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