definition
To assess the similarities and differences between two or more things ["to compare X with Y"]. Having made the comparison of X with Y, one might have found it similar to Y or different from Y.
example
Compare the tiger's coloration with that of the zebra.
definition
To declare two things to be similar in some respect ["to compare X to Y"].
example
Astronomers have compared comets to dirty snowballs.
definition
(grammar) To form the three degrees of comparison of (an adjective).
example
We compare "good" as "good", "better", "best".
definition
To be similar (often used in the negative).
example
A sapling and a fully-grown oak tree do not compare.
definition
To get; to obtain.