clear

Species whether an element coming after a floated element should be moved down or not.

clear: <value>;

The following values can be be appplied:

• none: The element is not moved down to clear past floating elements (the default).
• left: The element is moved down to clear past left floated elements.
• right: The element is moved down to clear past right floated elements.
• both: The element is moved down to clear past both left and right floated elements.

Making an img element move down a left floated h1 element.

.div1 h1 {
  float: left;
}

.div1 img {
  clear: left;
}