See:
Understand Alignment (Line of Dance)
Bar/Measure: A bar is a part of the music that starts with an accented beat and finishes right before the next accented beat. (bar lines on musical sheet)
Rhythm/Time Signature: how many beats in each measure/bar. Example: 1 2 3 vs SSQQ
Tempo: speed of music, i.e. the speed beat is played, how many beats per minute.
Travel direction and foot alignment may or may not be the same.
Foot alignment could be Diagonal Center, but traveling direction could be Line of Dance.
Turn is for the feet. Rotation is hip relative position to feet.