ancestry, pedigree, parentage, genealogy Not to be confused with: linage – the number of printed lines; the amount charged per printed line n. 1. a. Lineage definition, lineal descent from an ancestor; ancestry or extraction: She could trace her lineage to the early Pilgrims. See more. lineage definition: 1. the members of a person's family who are directly related to that person and who lived a long…. lineage synonyms, lineage pronunciation, lineage translation, English dictionary definition of lineage. The word lineage is used to describe everyone who descends from a particular ancestor. Learn more. Definition of lineage written for English Language Learners from the Merriam-Webster Learner's Dictionary with audio pronunciations, usage examples, and count/noncount noun labels. How to use lineage in a sentence. Search the meaning and definition of over one hundred thousand words! Define lineage. Mozart had six children, but none of them had children of their own, so the composer’s lineage … Lineage definition is - descent in a line from a common progenitor.