ink in WordNet English dictionary

1. dark protective fluid ejected into the water by cuttlefish and other cephalopods
   ink 
   
2. a liquid used for printing or writing or drawing
   ink 
   

1. fill with ink
   "ink a pen"
   ink 
   
2. mark, coat, cover, or stain with ink
   "he inked his finger"
   ink 
   
3. append one's signature to
   "They inked the contract"
   ink