Definitions

1. noun

Relating to a line or lineal descent; direct or continued in a straight line

“The family tree shows a lineal connection between the great-grandfather and his great-grandson.”

2. adjective

Following directly in a line or line of descent; not collateral

“The lineal descendants of the founder of the company continue to run the business.”

3. adverb

In a direct line or line of descent

“The family is lineal from the great-grandfather to the great-grandson.”