Mordent vs. Trill: What's the Difference?

Mordent and Trill Definitions
Mordent
A melodic ornament in which a principal tone is rapidly alternated with the tone a half or full step below.
Trill
A fluttering or tremulous sound, as that made by certain birds; a warble.
Mordent
(music) An ornament consisting of a single alternation between a given pitch and the one immediately below it.
Trill
The rapid alternation of two tones either a whole or a half tone apart.
Trill
A vibrato.
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Trill
A rapid vibration of one speech organ against another, as of the tongue against the alveolar ridge in Spanish rr.
Trill
A speech sound pronounced with such a vibration.
Trill
To sound, sing, or play with a trill.
Trill
To articulate (a sound) with a trill.
Trill
To produce or give forth a trill.
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Trill
(music) A rapid alternation between an indicated note and the one above it, in musical notation usually indicated with the letters tr written above the staff.
Trill
(phonetics) A type of consonantal sound that is produced by vibrations of the tongue against the place of articulation: for example, Spanish ⟨rr⟩, /r/.
Trill
A tremulous high-pitched vocal sound produced by cats.
Trill
(intransitive) To create a trill sound; to utter trills or a trill; to play or sing in tremulous vibrations of sound; to have a trembling sound; to quaver.
Trill
(transitive) To impart the quality of a trill to; to utter as, or with, a trill.
To trill a note, or the letter r
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Trill
To trickle.
Trill
To twirl.
Trill
True, respected
Trill
To flow in a small stream, or in drops rapidly succeeding each other; to trickle.
And now and then an ample tear trilled downHer delicate cheek.
Whispered soundsOf waters, trilling from the riven stone.
Trill
To turn round; to twirl.
Bid him descend and trill another pin.
Trill
To impart the quality of a trill to; to utter as, or with, a trill; as, to trill the r; to trill a note.
The sober-suited songstress trills her lay.
Trill
To utter trills or a trill; to play or sing in tremulous vibrations of sound; to have a trembling sound; to quaver.
To judge of trilling notes and tripping feet.
Trill
A sound, of consonantal character, made with a rapid succession of partial or entire intermissions, by the vibration of some one part of the organs in the mouth - tongue, uvula, epiglottis, or lip - against another part; as, the r is a trill in most languages.
Trill
The action of the organs in producing such sounds; as, to give a trill to the tongue. d
Trill
A shake or quaver of the voice in singing, or of the sound of an instrument, produced by the rapid alternation of two contiguous tones of the scale; as, to give a trill on the high C. See Shake.
Trill
A note that alternates rapidly with another note a semitone above it
Trill
Pronounce with a trill, of the phoneme `r';
Some speakers trill their r's
Trill
Sing or play with trills, alternating with the half note above or below