Meaning : Be present at (meetings, church services, university), etc..

Example : She attends class regularly.
I rarely attend services at my church.
Did you go to the meeting?.

Synonyms : go to

Meaning : Take charge of or deal with.

Example : Could you see about lunch?.
I must attend to this matter.
She took care of this business.

Synonyms : look, see, take care

Meaning : To accompany as a circumstance or follow as a result.

Example : Menuhin's playing was attended by a 15-minute standing ovation.

Meaning : Work for or be a servant to.

Example : May I serve you?.
She attends the old lady in the wheelchair.
Can you wait on our table, please?.
Is a salesperson assisting you?.
The minister served the King for many years.

Synonyms : assist, attend to, serve, wait on

Meaning : Give heed (to).

Example : The children in the audience attended the recital quietly.
She hung on his every word.
They attended to everything he said.

Synonyms : advert, give ear, hang, pay heed