trill (n.)

A term in the PHONETIC classification of CONSONANT sounds on the basis of their MANNER OF ARTICULATION: also known as a trilled consonant, or a ROLL, ‘trill’ refers to any sound made by the rapid tapping of one organ of articulation against another. (VOCAL-FOLD vibration is not included in such a definition.) Several ACCENTS of English use the trilled r, as in Welsh and Scots. French and German are examples of LANGUAGES which have a UVULAR trill. The trill may also be accompanied by audible friction, and would then be called a ‘FRICATIVE trill’. BILABIAL trills are also possible, as when one makes a ‘freezing’ noise, brrr [B], or imitates a car engine.