Tempo - The rate of speed in a musical work.

Theme - The musical subject of a piece (usually a melody).

Theme and variations - A statement of musical subject followed by restatements in different forms.

Theory - The study of how music is put together.

Tie - A curved line over or below two or more notes of the same pitch. The first pitch is sung or played and held for the duration of the notes affected by the tie.

Time signature - Same as meter signature.

Tone - A note; the basis of music.

Treble clef - The G clef falling on the second line of the staff.

Triad - A chord of three tones arranged in thirds, e.g. the C-major triad c-e-g, root-third-fifth.

Triplet - A group of three notes performed in the time of two of the same kind.