To involve something as a necessary or inevitable part or consequence. The project will entail a lot of hard work and dedication.
To limit the inheritance of property to a specific line of heirs, often through legal means. The estate was entailed to the eldest son, preventing it from being sold outside the family.
To logically imply or necessitate (a conclusion or consequence). In formal logic, the premise "All mammals breathe" entails that whales breathe.