Intervals

Two notes played in succession, usually in one hand but sometimes in both, whose distance is the interval of a 4th of any quality.

Notation

Symbols that indicate playing a note or range of notes either an octave higher or lower than notated.

Rhythm

Notes whose lengths are equal to one-fourth the value of a whole note.

Meter

An Italian term meaning "delaying"; an indication instructing the player to decrease speed, often gradually.

Rhythm

Notes whose lengths are four beats.