A breeze ruffled the neat hedges of Privet Drive, which lay silent and tidy under the inky sky, the very last place you would expect astonishing things to happen. Harry Potter [a baby] rolled over inside his blankets without waking up. One small hand closed on the letter beside him and he slept on, not knowing he was special, not knowing he was famous, not knowing he would be woken in a few hours' time by Mrs. Dursley's scream as she opened the front door to put out the milk bottles, nor that he would spend the next few weeks being prodded and pinched by his cousin Dudley...
(Harry Potter and the Sorcerer's Stone)
What’s the meaning of ‘over’ in the example?
(1) If we adopt the meaning of ‘roll’ as "to move or rock from side to side,” I think ‘over’ could mean ‘repeatedly: adv 11.’ So the baby might have been swaying in the blanket repeatedly.
(2) If we adopt the ‘rolled’ as a participle, the sentence can be a noun phrase that has a participle in it; ‘rolled over’ could mean ‘wrapped: v.tr.12a completely: adv 4.’ - Next sentence also has participle in its noun phrase (absolute phrase).; for the letter was closed on by an adult.
(3) I think one of the two above would be proper, but ‘roll over completely, 360 degrees’ wouldn’t. What can be the proper meaning of the ‘over’?