Pronunciation: /paɪ/
noun a mathematical constant representing the ratio of a circle's circumference to its diameter, approximately equal to 3.14159
A1 I ate a delicious slice of apple pi.
A2 She calculated the area of the circle using the value of pi.
B1 The mathematician used pi to solve the complex equation.
B2 The chef's specialty was baking different types of pi.
C1 The scientist used pi in their research to calculate accurate measurements.
C2 The mathematician's groundbreaking work on pi revolutionized the field of mathematics.
formal The value of pi is approximately 3.14159.
informal I can never remember the exact value of pi.
slang I heard that guy can recite pi to 100 decimal places!
figurative She has a memory like pi, always remembering details.
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