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41.
From the Origin:
1635–45; < It trillo quaver or warble in singing ≪
Gmc; cf. D give trillen to vibrate, late ME trillen to shake or rock (something)
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verb (used with object)

1. to sing or play with a vibratory or quavering effect.

2. Phonetics. to produce (a sound) with a trill.

3. (of birds, insects, etc.) to sing or utter in a succession of rapidly alternating sounds.

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verb (used without object)

4. to resound vibrantly, or with a rapid succession of sounds, as the voice, song, or laughter.

5. to utter or make a sound or succession of sounds resembling such singing, as a bird, frog, grasshopper, or person laughing.

6. to execute a shake or trill with the voice or on a musical instrument.

7. Phonetics. to execute a trill, esp. with the tongue, as while singing, talking, or whistling.

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noun

8. the act or sound of trilling.

9. Music. a rapid alternation of two adjacent tones; a shake.

10. a similar sound, or succession of sounds, uttered or made by a bird, an insect, a person laughing, etc.

11. Phonetics.
a. a sequence of repetitive, rapid, vibratory movements produced in any free articulator or membrane by a rush of air expelled from the lungs and often causing a corresponding sequence of contacts between the vibrating articulator and another organ or surface.

b. a speech sound produced by such a trill.
’if we can discover the meaning in the trilling of a frog,
perhaps we may understand why it is for us not merely noise but a song of poetry and emotion.’

adrian forsyth
by citypix November 11, 2009
 
29.
An adjective used for the meaning of three words. True+Real+Chill=Trill
Michaela is so trill, I think I'm going to call her to hang tonight.
by TaylorMcKenney June 25, 2008
 
30.
absolutly discusting
see ya trill and smells like trill
by trillis111 January 20, 2010
 
31.
To get drunk/tipsy
LETS GET TRILL!!!!
by Hesty November 05, 2008
 
32.
to not understand how outrageously inappropriate, taboo, and hilarious one is.
that girl is Trilling too hard
by da rey October 09, 2008
 
33.
To be both terrific and Ill.
Bitches say I'm Trillllllllll
by Funds August 13, 2008
 
34.
When a person, place or thing is a mix between tight and real. A description word that describes something that you like.
Friend 1: "Yo man, I watched LeBron James score 40 points last night.

Friend 2: "He's trill."
by Melvin Sneed January 18, 2008
 
35.
Having, or experiencing the euphoric feeling of, sex with the sky/universe. Feeling totally connected to everything; Basically awesomeness captured and bottled with all things cool and then released into your bloodstream.
We're just straight up trillin on blunt rock.
by Trillen McTriller December 26, 2007