a relation who is related to you through one of your parents, not through an aunt or uncle, etc.

Diana is a direct descendant of Robert Peel. 黛安娜是罗伯特‧皮尔的直系后代。

He was a direct relative of the artist.

His mother was a direct descendant of the governor of Massachusetts.

She had no living direct descendants.

It was always said that he was a direct relation of the former president.

As a direct relative of someone who was diagnosed with the disease, he should also be screened for it.

See also: direct adjective (STRAIGHT)