Meaning ofzero elementin English

Noun

1. an element in a set or structure that, when added to any other element, results in the original element
2. in a context-free grammar, a production that generates the empty string
3. in a vector space, an element that, when added to any other vector, results in the original vector
4. in a group, an element that, when multiplied by any other element, results in the original element