noun
estoppel
e-STOP-uhl/ɛˈstɑpəl/
A legal rule preventing someone from contradicting an earlier position or representation.
Estoppel can prevent a landlord from contradicting an earlier assurance.

Etymology
Estoppel may derive from a word for a bung or cork, making legal restraint a kind of stopping up. Alternatively, it comes from estop, already meaning to bar someone through that person's own prior act or declaration.
In context
lost my part of that lawsuit under collateral estoppel. Uh it was barred because I had been found guilty
More examples
- The tenant raises estoppel as a defense against eviction.
- The court applies estoppel to prevent the company from reversing its position.
- Her lawyer argues that estoppel bars him from denying his earlier statement.
Forms
estoppel · estoppels
estop verb — Legally prevent someone from contradicting an earlier position.
Similar words
- bar
- Bar covers any legal obstacle, not just prior contradictions.
- preclusion
- Preclusion often blocks issues already settled in earlier litigation.