a single person, thing or group regarded as complete; an amount used as a standard of measurement
whole
Cases of word usage
1) the smallest unit of a chemical element (atom)
2) a group of (usually 8) binary numbers used to code a unit of information (byte)
3) a unit of measurement of weight (= 0.20 grams) (carat)
4) a division of Great Britain, the largest unit of local government (county)
5) central processing unit (cpu)
6) an unit of measurement (of a circle) for angles (degree)
7) a unit of money (symbol $) in US, Canada, Australia etc (dollar)
8) a unit of measurement of weight (16 grams equals 1 ounce) (dram)
9) a unit of measurement (6 feet or 1.8 meters) of the depth of water; to understand fully (fathom)
10) metal goods for domestic use, e.g. pots and pans; mechanical equipment in a computer system e.g. the central processing unit, visual display unit etc (hardware)