Learner's definition of MARKED
1 : having a mark or a particular kind of mark
a marked card [=a playing card that has a secret mark on its back so that someone can see what the card is without looking at its face]
All the streets are well-marked. [=all the streets have signs showing their names]
The bird's wings are marked with white. [=the bird has white marks on its wings]
2 always used before a noun, [more marked; most marked] : very noticeable
He speaks with a marked accent.
There was a marked change in her attitude.
There's been a marked improvement in the weather.
His current friendly manner is in marked contrast to his usual behavior. [=is very different from his usual behavior]
a marked man/woman
1 : someone who is famous or who gets a lot of attention
Winning the race made him a marked man.
As the front-runner, the candidate has become a marked woman.
2 : someone who is not liked or trusted or who is in danger of being harmed