the GNU version of the Collaborative International Dictionary of English
v. To impede or bar by estoppel.
The Century Dictionary and Cyclopedia
To bar; stop; debar; specifically, in law, to bar, prevent, or preclude, usually by one's own act. See estoppel.
Word Usage
"I realized then at its urging that I must rise to fill an urgent void, that I must again estop the dike, that again I must needs for the good of this community stretch myself as a coat to cover the puddle, that Charlottesville might cross unsoiled."