1 (necessary) necesario cut the wood to the required length corte la madera del largo que se necesite; he couldn't raise the required amount of money no pudo recaudar los fondos necesarios
has he got the required qualities?
the qualities required for the job las cualidades que se requieren para el puesto
2 (fixed) establecido within the required time dentro del plazo establecido
in the required time by the required date
3 (compulsory) [+reading] obligatorio I shall leave at the weekend and do some of the required reading for my finals Pauline's story should be required reading for any girl coping with an unplanned pregnancy it is a required course for the degree required (by law)