a quantity that can assume any of a set of values | a variable quantity that is random |
a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity | something a little different from others of the same type |
something that is likely to vary; something that is subject to variation | an event that departs from expectations |
a star that varies noticeably in brightness | (biology) a group of organisms within a species that differ in trivial ways from similar groups |