1. The variety of LANGUAGE in a POST-CREOLE CONTINUUM closest to the standard or SUPERSTRATE language: for example, in Jamaica a local variety of standard English.
2. The most prestigious variety of a language, such as standard BrE with an RP accent in England.
"ACROLECT." Concise Oxford Companion to the English Language. . Encyclopedia.com. (January 20, 2018). http://www.encyclopedia.com/humanities/encyclopedias-almanacs-transcripts-and-maps/acrolect
"ACROLECT." Concise Oxford Companion to the English Language. . Retrieved January 20, 2018 from Encyclopedia.com: http://www.encyclopedia.com/humanities/encyclopedias-almanacs-transcripts-and-maps/acrolect