Concept: definite zero anaphora

Definition

Definite zero anaphora is an anaphoric construction in which a referent is not expressed by a form but can be inferred from the context.

Comments

Other terms are "null anaphora" and "definite null instantiation (DNI)". Definite zero anaphora must be distinguished from indefinite zero anaphora, which exists in many languages but has not been widely studied (e.g. Did you buy potatoes? Yes, I bought Ø.)

Croft's comparative concept
zero anaphora (CXN):

zero anaphora (a.k.a. definite null instantiation, DNI, null anaphora) (CXN) = the absence of a referring phrase for a referent in a construction. Zero anaphora is frequently used when the referent is active. (Section 3.3.1)

SIL Glossary
zero anaphora
Quotation
"Zero anaphora is one of the most natural, universal, ancient and functionally-coherent grammatical devices in the tool-kit of natural language. Not only is it an integral part of all mature grammars, but it is also one of the most robust pre-grammatical communicative devices found in the language of early child-hood, second-language pidgin and Broca’s aphasia." (Givón 2017: 3)
Sources
Givón 2017