Definition of rear on phrasal verb from the Oxford Advanced American Dictionary

 

rear on

 phrasal verb
phrasal verb
 
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Phrasal Verbs

rear somebody/something on something

[usually passive]
 
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to give a person or an animal a particular type of food, entertainment, etc. while they are young I'm the son and grandson of sailors and was reared on stories of life at sea.
See the Oxford Advanced Learner's Dictionary entry: rear on