Template:-

Use undefined after any floating elements and before elements you do not wish to float together with the first set. This uses a line break, which may introduce an ugly extra blank line. If you want to avoid that, use Clear instead. Do not use this template to deliberately add whitespace and blank lines between non-floating elements.

Details
- contains the markup:  This causes any previously established float to clear.

The unusual name of this template is a mnemonic for an imaginary horizontal line, which separates floating elements above from those below. Some editors prefer the mnemonic clr ("clear"), which simply redirects here. However, do not confuse clr with clear, which is a different template that uses  instead of   and so does not introduce an extra line break.