Vocabulary: multitude

A multitude is a large number.

It can mean 'a huge group of people':

The President spoke to the multitude.

Or just 'a lot', 'very many':

This project has a multitude of problems.

She came to my house, bringing a multitude of friends.

After the party, there was a multitude of empty bottles in the recycling bin.

This word is more common in writing than in speaking. It's a rather formal word. If you use it in casual conversation, it can sometimes sound a little humorous - just saying 'a lot' is not enough - you are making it clear that it was really a LOT.

How about you? When was the last time you were out in a multitude of people?