tip in WordNet English dictionary

1. to incline or bend from a vertical position
   "She leaned over the banister"
   lean  tilt  tip  slant  angle 
   
2. give a tip or gratuity to in return for a service, beyond the compensation agreed on
   "Remember to tip the waiter"; "fee the steward"
   tip  fee  bung 
   
3. strike lightly
   "He tapped me on the shoulder"
   tap  tip 
   
4. mark with a tip
   "tip the arrow with the small stone"
   tip 
   
5. remove the tip from
   "tip artichokes"
   tip 
   
6. give insider information or advise to
   "He tipped off the police about the terrorist plot"
   tip off  tip 
   
7. walk on one's toes
   tiptoe  tip  tippytoe 
   
8. cause to tilt
   "tip the screen upward"
   tip 
   
9. cause to topple or tumble by pushing
   topple  tumble  tip 
   

1. a relatively small amount of money given for services rendered (as by a waiter)
   gratuity  tip  pourboire  baksheesh  bakshish  bakshis  backsheesh 
   
2. an indication of potential opportunity
   "he got a tip on the stock market"; "a good lead for a job"
   tip  lead  steer  confidential information  wind  hint 
   
3. the top or extreme point of something (usually a mountain or hill)
   "the view from the peak was magnificent"; "they clambered to the tip of Monadnock"; "the region is a few molecules wide at the summit"
   peak  crown  crest  top  tip  summit 
   
4. a V shape
   "the cannibal's teeth were filed to sharp points"
   point  tip  peak 
   
5. the extreme end of something; especially something pointed
   tip