The term "ear" has several meanings depending on its context.
1) In a general sense, an ear refers to one of the two organs that make up the hearing and balance system in humans and animals. It is responsible for collecting sound waves and converting them into electrical signals which are then sent to the brain for interpretation.
2) Another meaning of "ear" relates to agriculture where it can refer to a part of a plant, such as an ear of corn or wheat. This refers to the edible grain-bearing structure of certain grasses like maize and wheat.
3) In finance, "ear" is another term for interest - the amount paid by a borrower for the use of someone else's money. It can also refer to profits or wages that are earned through hard work or effort.