The noun "band" is a concrete noun as a word for:a strip of material used to bind one object to another or to hold a number of objects together;a stripe or strip that contrasts with its surrounding color, texture, material, or composition;a plain ring for the finger;a metal or plastic ring place on a bird's leg for identification purposes;a group of people who play music together;a group of people or animals.The noun "band" is an abstract noun as a word for a moral obligation or bond.