css

/* <integer> values */
widows: 2;
widows: 3;

/* Global values */
widows: inherit;
widows: initial;
widows: revert;
widows: revert-layer;
widows: unset;

html

<div>
  <p>This is the first paragraph containing some text.</p>
  <p>
    This is the second paragraph containing some more text than the first one.
    It is used to demonstrate how widows work.
  </p>
  <p>
    This is the third paragraph. It has a little bit more text than the first
    one.
  </p>
</div>

css

div {
  background-color: #8cffa0;
  columns: 3;
  widows: 2;
}

p {
  background-color: #8ca0ff;
}

p:first-child {
  margin-top: 0;
}