ah

An expression of relief, relaxation, comfort, confusion, understanding, wonder, awe, etc. according to uttered inflection.

Ah, I understand now.

Ah! It's good to be back home!

A syllable used to fill space, particularly in music.

Boy don't try to front, uh, I Know just, just, what you are, ah, ah.

An instance of the interjection ah.

the crowd's oohs and ahs at the fireworks

To give a cry of "ah".

Mother and dad oohed and ahed over Cindy. She was only two months old but already was developing her personality.