Real Dictionary

left direction and political groupings
singular noun: The left is one of two opposite directions, sides, or positions. If you are facing north and you turn to the left, you will be facing west. In the word 'to', the ' t' is to the left of the 'o'.

left in American English 1
designating or of that side of one's body which is toward the west when one faces north, the side of the less-used hand in most people
adjective: of, pertaining to, or located on or near the side of a person or thing that is turned toward the west when the subject is facing north (opposed to right)
noun: the left side or something that is on the left side

left in American English 2
leave1
verb

left in British English 1
adjective: of or designating the side of something or someone that faces west when the front is turned towards the north
adverb: on or in the direction of the left
noun: a left side, direction, position, area, or part

left in British English 2
verb

left remaining
If there is a certain amount of something left, or if you have a certain amount of it left, it remains when the rest has gone or been used.
Left is the past tense and past participle of leave.