Fifteen: Meaning, Examples, and How to Use It

Meaning 1：fifteen (fifteen)

fifteen 🔊

/ˈfɪf.tiːn/

num.

The number that comes after fourteen and before sixteen.

fifteen 🔊

➕

/ˈfɪf.tiːn/

num.

The number equivalent to 15, coming after fourteen and before sixteen.

📁 Category：School Education 🔖 Level：Beginner

📖 Root Explanation

From Old English 'fīftīene' (five + ten).

💡 Mnemonic

Think of 'five' + 'ten' = fifteen; five fingers on one hand plus ten on two hands.

📖 Example

The teacher asked the class to solve math problems up to fifteen. 🔊 The teacher asked the class to solve math problems up to fifteen.

🔗 Collocations

fifteen minutes – a duration of 15 minutes

fifteen years old – age of 15 years

fifteen dollars – an amount of 15 US dollars

🔄 Synonyms

XV (num.) – Roman numeral representing fifteen

🌱 Derivatives

fifteenth (adj./n.) – the ordinal form of fifteen; position 15 in a sequence

fifteen-year-old (adj./n.) – a person or thing that is 15 years old

fifteenfold (adj./adv.) – fifteen times as much or as many

📖 Cultural Story

Fifteen originates from Old English 'fīftīene'. It commonly appears in age milestones and tennis scoring (e.g., fifteen-love).