1. Success or a favorable outcome that occurs by chance rather than through skill, planning, or effort
It was sheer luck that I found my lost keys in the couch.
Foi pura sorte que encontrei minhas chaves perdidas no sofá.
2. Complete or absolute luck with no other contributing factors
Getting that job was sheer luck; there were hundreds of applicants.
Conseguir aquele emprego foi pura sorte; havia centenas de candidatos.