Real Dictionary

sole
If you have sole charge or ownership of something, you are the only person in charge of it or who owns it.
The sole thing or person of a particular type is the only one of that type.

sole in American English 1
without another or others; single; one and only
adjective: being the only one; only

sole in American English 2
the bottom surface of the foot
to furnish (a shoe, etc.) with a sole
noun: the bottom or under surface of the foot
transitive verb: to furnish with a sole, as a shoe

sole in American English 3
any of various flatfishes (esp. family Soleidae) usually highly valued as food
noun: a European flatfish, Solea solea, used for food

sole in British English 1
adjective: being the only one; only

sole in British English 2
to provide (a shoe) with a sole
noun: the underside of the foot

sole in British English 3
noun: any tongue-shaped flatfish of the family Soleidae, esp Solea solea ( European sole): most common in warm seas and highly valued as food fishes