university

I still remember my first day at the university. I was so nervous!
I still remember my first day at university. I was so nervous!

She is thinking of leaving the university and looking for a job.
She is thinking of leaving university and looking for a job.

We normally use university without the when talking about someone studying there: ‘at university’, ‘leave university’.

Use a or the when talking about a particular university or its building: ‘She studies at a university in London.’ ‘I went to the university to pick up my sister.’

A similar rule applies to school, college, bed, church, court and, in British English, hospital.