Yard (yd)
Definition: A yard (symbol: yd) is a unit of length equal to exactly 0.9144 meters, or 3 feet and 36 inches. It belongs to the imperial and US customary systems.
History/origin: The yard has roots in medieval English measurement systems and was historically associated with body-based references such as the length of a stride or arm span. It was standardized internationally in 1959.
Current use: Yards are used in the United States and United Kingdom for sports fields, fabric measurement, gardening, and some construction and landscaping work.


