an official statement which explains how things must be done and what is allowed in a particular system or situation
Please follow the rules and don’t talk in the library.

to fight; do battle
The dog and cat always have conflicts.

a discussion of issues and viewpoints
Let’s debate the three different ideas.

an attitude or belief about something
What is your opinion about this idea? Do you like it?

of or for one person
This is your individual seat, so you don’t have to share it.

to bring together; to gather
I like to collect coins from different countries.

a piece of paper used for the purpose of voting
Write your votes on the ballot.

a decree, regulation, or custom
Most countries have a constitution.