"trilling" in the noun sense
1. Trilling, Lionel Trilling
United States literary critic (1905-1975)
"trilling" in the verb sense
1. trill
pronounce with a trill, of the phoneme `r'
"Some speakers trill their r's"
2. warble, trill, quaver
sing or play with trills, alternating with the half note above or below
Source: WordNet® (An amazing lexical database of English)
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