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Used to describe something that is third in a list or classification system.

Follows on from primary and secondary.
'Tertiary education' in most countries refers to college or university education.
by phantom oddity October 13, 2005
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3
in Strong Bad Email 207, entitled "too cool", after eight years from watching Senor Cardgage 's character video, people were cursed by saying this word randomly in a sentence with exaggerated lips
Strong Bad said, "Aaaah! You didn't just say-- (with lips and a voice nothing like his own) TERTIARY?!"
by Dacoool August 31, 2017
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