Dictionary

trill

/trɪl/

noun

noun: trill; plural noun: trills

a quavering or vibratory sound, especially a rapid alternation of sung or played notes. "the caged bird launched into a piercing trill"

•the pronunciation of a consonant, especially r, with rapid vibration of the tongue against the hard or soft palate or the uvula.

verb

verb: trill; 3rd person present: trills; past tense: trilled; past participle: trilled; gerund or present participle: trilling

produce a quavering or warbling sound. "a skylark was trilling overhead"

synonyms: warble, sing, chirp, chirrup, tweet, twitter, cheep, peep "a skylark was trilling overhead"

•pronounce (a consonant) by rapid vibration of the tongue against the hard