S: (n) alignment (the act of adjusting or aligning the parts of a device in relation to each other)
S: (n) camber (the alignment of the wheels of a motor vehicle closer together at the bottom than at the top)
S: (n) toe-in (the alignment of the front wheels of a motor vehicle closer together at the front than at the back)
S: (n) collimation (the accurate adjustment of the line of sight of a telescope)
S: (n) temperament (an adjustment of the intervals (as in tuning a keyboard instrument) so that the scale can be used to play in different keys)
S: (n) equal temperament (the division of the scale based on an octave that is divided into twelve exactly equal semitones) "equal temperament is the system commonly used in keyboard instruments"
S: (n) tune-up (adjustments made to an engine to improve its performance)