There are multiple definitions - click on the translation that matches your context.

istotne postanowienie umowne

rzeczownik

full

essential term

noun

Definitions of essential term

English

a material contract term that if broken can lead to the contract being terminated and damages being awarded to the non-breaching party

Seller hereby agrees and acknowledges that this is an essential term of this Agreement.

English

an important provision in a contract that is required for the contract to exist and to be legally binding

The essential terms of employment contracts include such things as pay, a basic job description, holidays, and the notice period that must be given in the event of dismissal.