In geometry, length was a dimensional measurement defined as the extent of an object or distance on a single linear dimensional plane. Similar terms, such as height, referred to vertical extent, and width, referred to side to side distance as measured across an object at right angles to the length.
When the crew of the USS Enterprise became miniaturized in 2269 while in orbit of Terra 10, Captain James T. Kirk recorded in his captain's log that at the rate they were shrinking, they would become approximately one centimeter tall, which was a size less-than-fingernail length, in 32 minutes. (TAS: "The Terratin Incident")
The Treaty of Armens was 500,000 words in length, this was so to accommodate the Sheliak, who considered the English language irrational and demanded so many words to avoid any future misunderstandings. (TNG: "The Ensigns of Command")
The two-dimensional beings encountered by the USS Enterprise-D in 2368 was determined to virtually flat, and existing entirely on a single two-dimensional plane: length and width, but not height. (TNG: "The Loss")
Data explained to Julian Bashir, when they met in 2369, that he could control the rate of his follicle replenishment, or hair growth, however, he had not yet had a reason to modify the length of his hair. (TNG: "Birthright, Part I")
Units of length
- Astronomical unit
- Light year