width

Concise Oxford English Dictionary © 2008 Oxford University Press:
width /wɪtθ, wɪdθ/

▶noun

• 1 the measurement or extent of something from side to side; the lesser of two or the least of three dimensions of a body.

  ■ a piece of something at its full extent from side to side.

• 2 wide range or extent.

– origin C17: from wide + -th2, on the pattern of breadth (replacing wideness).