Final answer:
An element is a descriptive word, phrase, or clause that is not essential to the meaning of a sentence.
Step-by-step explanation:
Definition of an Element in English:
An element is a descriptive word, phrase, or clause that is not essential to the meaning of a sentence. It can be any group of words that is missing either a subject or a verb. For example, in the sentence 'The red car, parked on the street, is mine,' the phrases 'red car' and 'parked on the street' are elements.