front end
noun
• the front of a car or other vehicle.
• the part of a radio or television receiver to which the aerial signal goes first.
• the part of a computer system or application with which the user interacts directly.
• "designers tend always to work on the front end"
front end
adjective
• (of money) paid or charged at the beginning of a transaction.
• "a front-end fee"
• relating to or denoting the part of a computer system or application with which the user interacts directly.