Phi

/faɪ/

Meaning & Definition

noun

The 21st letter of the Greek alphabet (Φ, φ), used in mathematics and science to represent various concepts.

In geometry, phi often represents the golden ratio, approximately equal to 1.618.

A symbol used in various fields, including physics and engineering, often representing a phase angle.

The phase difference between the two signals is denoted by phi.

A term in social science and psychology, representing a measure of a person's ability to influence and persuade.

Researchers studied phi as a factor in determining leadership effectiveness.

A statistical measure used in certain contexts to describe associations between binary variables.

The phi coefficient was calculated to assess the relationship between smoking and lung cancer.

From Ancient Greek φῖ, from Phoenician letter 𐤐.

phi phenomenon

A psychological phenomenon where images appear to flow seamlessly together when presented in succession.

phi coefficient

A measure of association for two binary variables.

golden ratio

A mathematical ratio known for its aesthetic properties.

phi-function

A function that counts the positive integers up to a given integer that are relatively prime to it.

Phi as a term in certain social contexts refers to someone who is highly intelligent or philosophical.

He's such a phi, always pondering life's deepest questions.

In gaming, phi can refer to a character or player who embodies wisdom or strategy.

That player's moves are so calculated; he's the phi of this game.