An example of oppress is for a dictator to force the poor people of his country to work in terrible conditions for little pay.
An example of oppress is to have worry that you might be laid off from your job.
A people who were oppressed by tyranny.
Origin of oppress
From American Heritage Dictionary of the English Language, 5th Edition
- From Middle English oppressen, from Old French oppresser, from Medieval Latin oppressare (“to press against, oppress"), frequentive of Latin opprimere, past participle oppressus (“to press against, press together, oppress"), from ob (“against") + premere, past participle pressus (“to press"); see press.