noun
    
    plural -als
    
    [noncount] :the belief that something or someone is good or acceptable :a good opinion of someone or something
    
    
    
    
    
    
    
    
    
    permission to do something :acceptance of an idea, action, plan, etc. [noncount]
    
    
    
    
    
    
    
    
    
    
    
    
    
    on approval
    
    If you buy something on approval, you can return it after using it for a period of time if you decide that you do not want it.