A small sum of money given to someone for performing a service; a gratuity.
A piece of confidential, advance, or inside information: got a tip on the next race.
A helpful hint: a column of tips on gardening.
To give a tip to: tipped the waiter generously.
To give as a tip: He tipped a dollar and felt that it was enough.
To provide with a piece of confidential, advance, or inside information: a disgruntled gang member who tipped the police to the planned robbery.
[tip-er] 
(tĭp) 
ər