1. A component, part, or feature that is required or essential for something to exist, function, or be complete
A necessary element of a valid contract is the agreement of both parties.
Um elemento necessário de um contrato válido é o acordo de ambas as partes.
2. In logic, mathematics, or law: a condition that must be present for a particular outcome or conclusion
Education is a necessary element for social development.
A educação é um elemento necessário para o desenvolvimento social.