run in the/(one's) family(redirected from run in their family)
run in the/(one's) family
To be a hereditary trait or a characteristic frequently exhibited by members of a family. I wonder if she's pregnant with twins—they do run in our family, you know. Cassie's drawing will probably win the contest—artistic ability just runs in her family.
run in the family
[for a characteristic] to appear in many (or all) members of a family. My grandparents lived well into their nineties, and it runs in the family. My brothers and I have red hair. It runs in the family.