acceptable in WordNet English dictionary

1. worthy of acceptance or satisfactory
   "acceptable levels of radiation"; "performances varied from acceptable to excellent"
   acceptable 
   
2. adequate for the purpose
   "the water was acceptable for drinking"
   acceptable 
   
3. meeting requirements
   "the step makes a satisfactory seat"
   satisfactory  acceptable 
   
4. judged to be in conformity with approved usage
   "acceptable English usage"
   acceptable