beneficial /ˌbɛn.ɪˈfɪʃ.əl/adjective 3noun 1forms 3 adjective3 •Helpful or good to something or someone.Recycling and reusing garbage can be beneficial to the environment. •Receiving a benefit from something. •Relating to a benefice. noun1 •Something that provides a benefit.Daytime temperatures may be too hot for just-released beneficials, and birds and other predators are out in full force during the day. — 1997 formsbeneficials · more beneficial · most beneficial