Definition of length from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.

The Planck length, denoted by , is the unit of length approximately 1.6 × 10 −35 metres, 6.3 × 10 −34 inches, or about 10 −20 times the diameter of a proton. It is in the system of units known as Planck units. The Planck length is deemed "natural&qu ot; because it can be defined from three fundamental physical constants: the speed of light, Planck's constant, and the gravitational constant.Value · Physical significance · History · References in science ...

noun. the measure of how long a thing is; measurement of anything from end to end; the greatest of the two or three dimensions of anything; extent in space; distance anything ...

Prefix : kilo: hecto : deka : meter : deci : centi : milli : Abbreviation: k: h: dk: m: d: c: m: Example: kilometer: hectometer: dekameter: meter: decimeter: centimeter: millimeter ...

Length is the long dimension of any object. The length of a thing is the distance between its ends, its linear extent as measured from end to end. This may be distinguished from height, which is vertical extent, and width or breadth, which are the distance from side to side, measuring across the object at right angles to the length.Units of length · Length of moving rods · Generalisations

Length is a measure how long something is from end to end. This may also include distance, which is defined as the space between points or objects.

Synonyms of length at Thesaurus.com. length definitions and translations. Crossword and puzzle games.

History. The Egyptians have evidence that proves that they may be the earliest civilization that discovered a standard unit for length. The Egyptian cubit was developed about 3000 ...

noun . 1. the longest extent of anything as measured from end to end: the length of a river. 2. the measure of the greatest dimension of a plane or solid figure.

Choose which length conversion page to load. ... Choose which conversion page you wish to use. Common Length Conversions A few of the more common length and distance units.