( especially BrE ) ( NAmE usually coun·sel·or ) / ˈkaʊnsələ(r); NAmE / noun
1.
a person who has been trained to advise people with problems, especially personal problems :
a marriage guidance counsellor
2.
( NAmE , IrishE ) a lawyer
3.
( NAmE ) a person who is in charge of young people at a summer camp
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WORD ORIGIN
Middle English (in the general sense adviser ): from Old French conseiller , from Latin consiliarius , and Old French conseillour , from Latin consiliator , both from consilium consultation or advice.