correlation

noun

cor·​re·​la·​tion ˌkȯr-ə-ˈlā-shən 

ˌkär-

1

: the state or relation of being correlated

specifically : a relation existing between phenomena or things or between mathematical or statistical variables which tend to vary, be associated, or occur together in a way not expected on the basis of chance alone

… the obviously high positive correlation between scholastic aptitude and college entrance …

—J. B. Conant

2

: the act of correlating

correlational

ˌkȯr-ə-ˈlā-sh(ə-)nəl 

ˌkär-

adjective

Examples of correlation in a Sentence

the correlation of brain size and intelligence

Researchers have found a direct correlation between smoking and lung cancer.

She says that there's no correlation between being thin and being happy.

Recent Examples on the Web

The correlation is generally stronger between gold and real interest rates, which is the interest rate paid minus inflation. — Faith Wakefield, USA Today, 8 July 2026

As the chart shows, there’s also a clear correlation with age. — Neil J. Rubenking, PC Magazine, 8 July 2026

Previous studies in Australia have shown this correlation, including one analysis that suggests bites from tiger sharks are more common following heavy rainfall. — Sam Nichols, Scientific American, 8 July 2026

There are clear correlations between sleep deprivation and cardiovascular problems and metabolic conditions. — Veronique Greenwood, Time, 8 July 2026

Word History

Etymology

Medieval Latin correlation-, correlatio, from Latin com- + relation-, relatio relation

First Known Use

1561, in the meaning defined at sense 1

Phrases Containing correlation

• coefficient of correlation
• correlation coefficient
• rank correlation

Rhymes for correlation

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Kids Definition

correlation

noun

cor·​re·​la·​tion ˌkȯr-ə-ˈlā-shən 

ˌkär-

1

: the act or process of correlating

2

: the state of being correlated

especially : a mutual relation discovered to exist between things

the correlation between smoking and lung cancer

correlational

-shnəl 

-shən-ᵊl

adjective