a list sorted at more than one level e.g. a frequency list sorted by word form followed by lemma and then tag, see this multilevel list in the BAWE corpus.
https://www.sketchengine.eu/wp-content/uploads/SE_logo_330x150-bleed-transp-bg.png002016-06-22 09:34:482016-12-13 13:29:28multilevel list
