Onwards means continuing forward in space or time. From 1945 onwards, move onwards, onwards and upwards.
The commonest use is with a date, where from a year onwards means from then until now. Onwards and upwards is the standard cheerful thing said after a setback, and America drops the s and says onward.
1adverbonwardsContinuing forward in space or time.
“From the age of twelve onwards, she practised the piano every day.”
onwards is a direction.
Also accepted in games: onward
From on + -wards.
Etymology from Wiktionary, CC BY-SA