later in WordNet English dictionary

1. happening at a time subsequent to a reference time
   "he apologized subsequently"; "he's going to the store but he'll be back here later"; "it didn't happen until afterward"; "two hours after that"
   subsequently  later  afterwards  afterward  after  later on  subsequently  later  afterwards  afterward  after  later on 
   
2. at some eventual time in the future
   "By and by he'll understand"; "I'll see you later"
   by and by  later  by and by  later 
   
3. comparative of the adverb `late'
   "he stayed later than you did"
   later  later 
   

1. at or toward an end or late period or stage of development
   "the late phase of feudalism"; "a later symptom of the disease"; "later medical science could have saved the child"
   late  later 
   
2. coming at a subsequent time or stage
   "without ulterior argument"; "the mood posterior to"
   later  ulterior  posterior