Definition of "shifting"

I remember the last time I saw Macbeth played, the discrepancy I felt at the changes of garment which he varied, the shiftings and reshiftings, like a Romish priest at mass.

1811, Charles Lamb, On the Tragedies of Shakespeare Considered with Reference to their Fitness for Stage Representation

But shiftings and readjustments ensued, as they are sure to do with a walking-party. Cope presently found himself scuffling through the thin grass and the briery thickets alongside the young business-man.

1919, Henry B[lake] Fuller, “Cope at His House Party”, in Bertram Cope’s Year: A Novel, Chicago, Ill.: Ralph Fletcher Seymour, The Alderbrink Press, page 94

Then everyone moved at the same time — slight shiftings of the hands and feet, furtive easings of position.

1978, Jack Vance, The View from Chickweed's Window