Learner's definition of LENGTH
1 a : the distance from one end of something to the other end : a measurement of how long something is
“What is its length?” [=how long is it?] “It measures 10 inches in length.” [=it is 10 inches long]
We walked the entire length of the beach. [=we walked from one end of the beach to the other]
The length of the table is six feet, and its width is three feet.
[count] b [noncount] : the size or extent of a piece of writing
c [noncount] : the quality or state of being long
Your essay should be no more than 250 words in length.
five pages in length [=five pages long]
a book-length poem [=a very long poem; a poem that has the same number of pages as some books]
2 [noncount] : the amount of time something lasts
They want to extend the length of the school year. [=to make the school year longer; to lengthen the school year]
the length of a movie
If you're in town for any length of time [=for more than just a short time], be sure to see the museum.
3 [count] : the length of something used as a unit of measure
Our horse won the race by a length. [=by a distance equal to the length of one horse]
They were two car lengths behind us.
I managed to swim four lengths of the pool. [=to swim from one end of the pool to the other end four times]
— see also at arm's length at 1arm
4 [count] : a piece of something that is long and thin or narrow 5 [noncount] : a measure of how far down on your body something (such as your hair or a piece of clothing) reaches
1 : for a long time
We talked at length about the ceremony.
The speaker went on at considerable/great/some length.
No one was questioned at any length about it. [=no one was questioned for a long period of time]
2 : in a full or complete way 3 literary : after a long time
go to any lengthorgo to any/extreme/great (etc.) lengths
: to make a great or extreme effort to do something
the length and breadth of
: through all parts of (a place)