What is the meaning of the word "venter"?

Definitions:

  1. a hollow region of an area that protrudes, such as the region of the body of a vertebrate between the thorax and the pelvis or the womb copy to clipboard noun
    • The venter of the patient was covered in splotches. copy to clipboard
  2. a speaker who expresses or gives vent to a personal opinion or grievance copy to clipboard noun
    • The town meeting was filled with venters who were against the new building project. copy to clipboard
  3. an individual, often a woman, with offspring copy to clipboard noun
    • The venter had four babies. copy to clipboard