1. people from whom one is descended, especially those more remote than grandparents; forebears
Usage: plural form of ancestor
2. early forms of animals or plants from which later forms have evolved
Usage: biological context

Examples

• She traced her ancestors back to Ireland in the 1800s.
• Many Americans research their ancestors using genealogy websites.
• The museum displayed artifacts left by our ancestors.
• His ancestors were among the first settlers in the region.
• Birds are believed to be descendants of dinosaur ancestors.
• The ancient burial ground contained the remains of their ancestors.
• Scientists study fossil ancestors to understand evolution.