meterlong

Meterlong is not typically listed as a standalone word in major dictionaries. The standard form in formal writing is meter-long, a hyphenated compound adjective meaning having a length of one meter. The closed form meterlong may appear in informal contexts or as a brand name, but it is uncommon in technical or academic writing.

The meter is the International System of Units (SI) base unit for length. Since 1983, it is defined in terms of the distance light travels in vacuum during 1/299,792,458 of a second. This definition ties a meter to fundamental physical constants rather than a physical artifact. In historical practice, meters were once defined by physical bars, which were later superseded by the light-based definition.

Usage of meter-long typically describes objects around one meter in length. It is widely used in manufacturing, construction, labeling, and everyday measurement. Examples include a meter-long cable, a meter-long plank, or a meter-long banner. When used before a noun, the term is usually hyphenated; phrases such as “the rod is meter long” are less common, with “the rod is one meter long” often preferred in formal writing.

Conversions are straightforward: 1 meter equals 100 centimeters or 1000 millimeters, and is about 39.37 inches or 3.28084 feet. The concept of a meter-long dimension is a practical reference across disciplines that require standardized length measurements.

See also: Meter (unit); Length; SI units.