Definition of avail verb from the Oxford Advanced Learner's Dictionary

avail

verb

əˈveɪl

əˈveɪl

1 [transitive] avail somebody (something)| avail something (formal or old-fashioned) to be helpful or useful to somebody2 [transitive, intransitive] (Indian English, non-standard) to make use of something, especially an opportunity or offeravail something To avail all these benefits, just register online.avail of something Why not avail of our special offers?

Phrasal verbs

avail yourself of something

(formal) to make use of something, especially an opportunity or offerGuests are encouraged to avail themselves of the full range of hotel facilities.