apportion

UK: /əˈpɔː^rʃ^ən/ US: /əˈpɔr-ʃən/ ,(ə pôr′shən, ə pōr′-)

WordReference Random House Learner's Dictionary of American English © 2026

ap•por•tion /əˈpɔr-ʃən/   v. [~ + object (+ among/between + object)]

1. to divide (parts or shares) and distribute by some rule:
   to apportion expenses among the three men.

ap•por•tion•ment, n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2026

ap•por•tion  (ə pôr′shən, ə pōr′-), v.t. 

1. to distribute or allocate proportionally;
   divide and assign according to some rule of proportional distribution:
   to apportion expenses among the three men.

• Middle French apportionner, equivalent. to ap- ap-¹ + portionner to portion
• 1565–75

ap•por′tion•a•ble, adj. 
ap•por′tion•er, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

apportion / əˈpɔːʃən/ verb

1. (transitive) to divide, distribute, or assign appropriate shares of; allot proportionally

apˈportionable adjective