Privilege exists when one ...

Privilege exists when one group has something of value that is denied to others simply because of the groups they belong to, rather than because of anything they’ve done or failed to do. Access to privilege doesn’t determine one’s outcomes, but it is definitely an asset that makes it more likely that whatever talent, ability, and aspirations a person with privilege has will result in something positive for them.
 Peggy McIntosh

Quotes from the same author

For me white privilege has turned out to be an elusive and fugitive subject. The pressure to avoid it is great, for in facing it I must give up the myth of meritocracy. If these things are true, this is not such a free country; one's life is not what one makes it; many doors open for certain people through no virtues of their own.
 Peggy McIntosh
It seems to me that obliviousness about white advantage, like obliviousness about male advantage, is kept strongly inculturated in the United States so as to maintain the myth of meritocracy, the myth that democratic choice is equally available to all. Keeping most people unaware that freedom of confident action is there for just a small number of people props up those in power and serves to keep power in the hands of the same groups that have most of it already.
 Peggy McIntosh
I can take a job with an affirmative action employer without having my co-workers on the job suspect that I got it because of my race.
 Peggy McIntosh