What does "percentile" mean?

Any of the ninety-nine points that divide an ordered distribution into one hundred parts, each containing one per cent of the population.

How do you pronounce "percentile"?

Pronounced //pəɹˈsɛn.taɪl//.

Common synonyms include: centile, %ile, cutpoint, descriptive statistic, distribution descriptor, percentile position.

/pəɹˈsɛn.taɪl/ noun

noun ·Rare ·Advanced level

Noun

1
Any of the ninety-nine points that divide an ordered distribution into one hundred parts, each containing one per cent of the population.
2
(statistics) any of the 99 numbered points that divide an ordered set of scores into 100 parts each of which contains one-hundredth of the total wordnet
3
Any one of the hundred groups so divided.
"She is highly intelligent—she has an IQ in the top percentile."

"Tom is in the first percentile for maths in Australia."

Coined by Francis Galton in 1885, from percent + -ile.