Definition of inversions:
(n) :
The action of inverting.
(n) :
The act of being in an inverted state; being upside down, inside out, or in a reverse sequence.
(n) :
(music) The reversal of an interval; the move of one pitch in an interval up or down an octave.
(n) :
(music) The position of a chord which has a note other than the root as its bass note.
(n) :
(music) The flipping of a melody or contrapuntal line so that high notes become low and vice versa; the reversal of a pitch contour.
(n) :
(grammar) Deviation from standard word order, as for example by putting the predicate before the subject. It takes place in questions with auxiliary verbs; in normal, affirmative clauses beginning with a negative particle, for the purpose of emphasis; and in other rhetorical devices or unusual situations.