Definitions

1. adverb

used to indicate that something is happening or applies at the present time

“I’m going to the store today.”

2. noun

a particular day considered as a unit of time

“What are you doing today?”

3. adverb

used to indicate that something is being experienced or felt at the present time

“I feel happy today.”

4. preposition

used to indicate the time or occasion on which something happens or applies

“She is arriving today at 5 pm.”