verb
    
    -fies; -fied; -fying
    
    to talk and answer questions about something especially in a court of law while formally promising that what you are saying is true [no obj]
    
    
    
    
    
    
    
    
    
    
    
    
    
    to talk about or say (something) in an honest and confident way [+ obj]
    
    
    
    + to
    
    
    
    to show that something is true or real :to give proof of something [no obj]
    
    + to
    
    
    
    
    
    
    
    [no obj] US :to talk to a group of people about your belief in God especially as part of a church service