There are 2 definitions of knoll in English:

knoll1

Line breaks: knoll
Pronunciation: /nəʊl
 
/

noun

A small hill or mound: a grassy knoll
More example sentences
  • This walk follows a circular route around an irregularly shaped tarn, through broadleaf woodland and shady conifers and across grassy knolls nibbled by sheep.
  • The species also extends to several of the rocky knolls in the area.
  • Ahead were more hills, more little valleys, more slopes and hollows and knolls.
Synonyms
hillock, mound, rise, hummock, hill, hump, knob, tor, tump, barrow, outcrop, bank, ridge, dune, elevation, acclivity, eminence; Geologydrumlin; Scottishbrae; South Africankoppie

Origin

Old English cnoll 'hilltop', of Germanic origin; related to German Knolle 'clod, lump, tuber' and Dutch knol 'tuber, turnip'.

Definition of knoll in:

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Word of the day epyllion
Pronunciation: ɪˈpɪlɪən
noun
a narrative poem resembling an epic in style...

There are 2 definitions of knoll in English:

knoll2

Line breaks: knoll
Pronunciation: /nəʊl
 
/

verb & noun

Archaic form of knell.

Origin

Middle English: probably an imitative alteration of knell.

Definition of knoll in:

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Word of the day epyllion
Pronunciation: ɪˈpɪlɪən
noun
a narrative poem resembling an epic in style...