In the International System of Quantities, length is any quantity with dimension distance. In other contexts, length is a measured dimension of an object. . Length is a measure of one dimension, whereas area is a measure of two dimensions (length squared) and volume is a measure of three dimensions (length cubed). 1 : the measured distance from one end to the other of the longer or longest side of an object. 2 : a measured distance. The road is three miles in length. a specified distance, esp between two positions or locationsthe length of a race. a period of time, as between specified limits or moments. something of a specified, average, or known size or extent measured in one dimension, often used as a unit of measurementa length of cloth. length definition: 1. the measurement of something from end to end or along its longest side: 2. a piece of something such as string or pipe: 3. a unit used in . May 23, 2018 - The length CSS data type represents a distance value. Lengths can be used in numerous CSS properties, such as width, height, margin, . Mar 16, 2018 - The length property of a String object indicates the length of a string, in UTF-16 code units. Definition and Usage. The length property returns the length of a string (number of characters). The length of an empty string is 0. The number of elements currently matched. The .size() method will return the same value. Example: Count the divs. Click to add more. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.