(v) :
to assess the similarities (between two things ["to compare X and Y"] or between one thing and another ["to compare X with Y"]. Having made the comparisonwith X, one might have found it similarto X or differentfrom X; to form the three degrees of comparison of (an adjective)
"astronomers have compared comets to dirty snowballs"
(v) :
to assess the similarities (between two things ["to compare X and Y"] or between one thing and another ["to compare X with Y"]. Having made the comparisonwith X, one might have found it similarto X or differentfrom X; to form the three degrees of comparison of (an adjective)
"astronomers have compared comets to dirty snowballs"