If you notice that crumbs appear on your little brother's shirt whenever the cookies disappear from the cookie jar, you can say that you've correlated two facts, meaning that you've established or revealed that they're linked in a way that explains both of them.

Detectives correlate pieces of evidence in order to solve crimes. For example, they might correlate a suspect’s bandaged hand with a shattered third-floor window. Correlate can also be used as a noun. Some companies promote products by suggesting that their products increase “happiness correlates,” or factors that have been shown to have a relationship with happiness, like health and friendship.

Definitions of correlate

v bear a reciprocal or mutual relation

“Do these facts correlate?”
Type of:
agree, check, correspond, fit, gibe, jibe, match, tally
be compatible, similar or consistent; coincide in their characteristics

v bring into a mutual, complementary, or reciprocal relation

“I cannot correlate these two pieces of information”
Type of:
associate, colligate, connect, link, link up, relate, tie in
make a logical or causal connection

n either of two or more related or complementary variables

Type of:
variable, variable quantity
a quantity that can assume any of a set of values

adj mutually related

correlated, correlative
related, related to
being connected either logically or causally or by shared characteristics

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