FIL'IAL, adjective [Latin filius, a son, flia, a daughter.] 1. Pertaining to a son or daughter; becoming a child in relation to his parents. filial love is such an affection as a child naturally bears to his parents. filial duty or obedience is such duty or obedience as the child owes to his parents. 2. Bearing the relation of a son. Springs of like leaf erect their filial heads.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI