It means "Work conquers all".
The state motto for Oklahoma is Labor omnia vincit(Hard work conquers all), a reference that especially applies to the difficulties in farming in much of the state. It was originally on the territorial seal as well, reflecting the work ethic of its pioneers.
The phrase originally appeared in the poet Virgil's Georgics in the form Labor omnia uicit improbus , or "hard work overcomes all things", which supported Augustus Caesar's recommendation that Romans return to working the land.
Mpumalanga's motto is 'Omnia labor vincit'.
Balmoral College's motto is 'Labor Omnia Vincit'.
The motto of Strathallan School is 'Labor omnia vincit'.
Montfort College's motto is 'Labor Omnia Vincit'.
"Labor conquers all".(In the form Labor omnia vincit, or "hard work conquers all", it is the state motto of Oklahoma.)
Royal Pioneer Corps's motto is 'Labor omnia vincit'.
The motto of Beaufort Secondary College is 'Labor Omnia Vincit'.
Montfort Secondary School's motto is 'Labor Omnia Vincit'.
The motto of William Allitt School is 'Labor omnia vincit'.
Ferraz de Vasconcelos's motto is 'Labor Omnia Vincit'.
The motto of Labori High School is 'Labor Omnia Vincit'.
Centenary College of Louisiana's motto is 'Labor Omnia Vincit'.