The Hebrew noun gezer means a piece or portion — something that has been cut off or divided. It is used in the covenant-cutting ceremony of Genesis 15 to describe the pieces of animals between which Abraham walked.
Gezer appears in the foundational covenant narrative of Genesis 15, where God alone passes between the divided animal pieces as a smoking firepot and blazing torch. This dramatic act signified that God swore the covenant oath unilaterally — if the covenant were broken, let it be done to God as to these cut-up animals. This extraordinary passage reveals the unconditional nature of the Abrahamic covenant. The word gezer thus stands at the very heart of redemptive history, pointing to a God who binds Himself to His promises.