Comparison.
An instruction or command that compares two values.
Illustration by comparison; simile.
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.
To declare two things to be similar in some respect ["to compare X to Y"].
(grammar) To form the three degrees of comparison of (an adjective).
To be similar (often used in the negative).
To get; to obtain.