Thirtieth
/θˈɜrtiəθ/
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Definition
(adj) The ordinal form of the number thirty.
Sentence Examples
Thirtieth birthdays often bring with them fears of old age.
I know what today is. It's your thirtieth birthday, isn't it?
CEFR Practice Quiz
They are celebrating their ____ wedding anniversary today with a big party for all their family and friends today.