1
a
: set over against something that is at the other end or side of an intervening (see intervene sense 4) line or space
opposite interior angles
opposite ends of a diameter
b
: situated in pairs on an axis (see axis sense 3) with each member being separated from the other by half the circumference (see circumference sense 2) of the axis
opposite leaves
compare alternate
2
a
: occupying an opposing and often antagonistic position
opposite sides of the question
b
: diametrically different (as in nature or character)
opposite meanings
3
: contrary to one another or to a thing specified : reverse
gave them opposite directions
4
: being the other of a pair that are corresponding (see corresponding sense 1a) or complementary (see complementary sense 2) in position, function, or nature
In the final position, the two exchanged rooks and left bishops of opposite color, a position that often leads to a draw …—The Chicago Sun Times
see also opposite sex
5
: of, relating to, or being the side of a baseball field that is near the first base line for a right-handed batter and near the third base line for a left-handed batter
oppositely
adverb
oppositeness
noun
1
: something that is opposed to some other often specified thing
2
: antonym
3
: additive inverse
especially
: the additive inverse of a real number
: on or to an opposite side
1
: across from and usually facing or on the same level with
sat opposite each other
2
: in a role complementary to
played opposite the leading man in the comedy
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Merriam-Webster unabridged
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