Pronunciation

/thɜːˈti/

Definitions

• Numeral: A cardinal number indicating the quantity 30, used to count or indicate a group of thirty items. For example: “There are thirty students in the class.”
• Adjective: Designating a quantity or position that is the third in a series of tens. For example: “Thirty percent of the population voted in the election.”

Phrases

• “Thirty years old” refers to the age of someone born 30 years ago.
• “Thirty days hath September” is a mnemonic to remember the number of days in each month with a specific pattern.
• “A score and ten” is an informal way to say approximately thirty.

Example Sentences

• Numeral: “I have thirty dollars to spend on books.”
• Adjective: “The temperature reached thirty degrees Celsius during the day.”
• “They completed the project in just thirty hours.”

Synonyms

• Thirtyish (informal)
• Thirties (as in “in one’s thirties”)
• Three-score (archaic)
• Half-a-dozen (informal, six)

Antonyms

• Few (less than thirty)
• Many (more than thirty)
• Zero (not thirty)