all over is an adverb and adjective meaning "over the entire area". It carries 3 recorded senses.
over the entire area
“the wallpaper was covered all over with flowers”
“she ached all over”
“everything was dusted over with a fine layer of soot”
to or in any or all places
“You find fast food stores everywhere”
“people everywhere are becoming aware of the problem”
“he carried a gun everywhere he went”
“looked all over for a suitable gift”
colloquialism
Definitions, synonyms and semantic relations for all over come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.