Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: 'farther', from ulter 'in a position beyond', from uls 'beyond'

ulterior

adjective
     
ul‧te‧ri‧or

ulterior motive/purpose etc

a reason for doing something that you deliberately hide in order to get an advantage for yourself:
He's just being nice. I don't think he has any ulterior motives.

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