by request, in response or accession to a request: The orchestra played numbers by request.
Origin: 1300–50;Middle Englishrequeste (noun) < Old French < Vulgar Latin*requaesita things asked for, noun use of neuter plural past participle of *requaerere to seek, for Latinrequīrere. See require, quest
early 14c., from O.Fr. requeste (Fr. requête) "a request," from V.L. *requæsita, from L. requisita "a thing asked for," fem. of requisitus "requested, demanded" (see requisite). The verb is first recorded 1530s.