The word "common" generally means:

1. Frequent or usual — something that happens often or is found in many places or among many people.
   Example: It is common to see birds in the park.

2. Shared by all or many — something that is held or experienced by a group of people.
   Example: They have a common interest in music.

3. Ordinary or not special — something that is normal or average, not rare or unique.
   Example: This is a common type of flower.

If you'd like, I can provide examples or explain the word in different contexts!