aah

Short definition from Wiktionary

Interjection

1. 1
   Indication of amazement or surprise or enthusiasm.
2. 2
   Indication of joyful pleasure.
3. 3
   Indication of sympathy.
4. 4
   Indication of mouth being opened wide.
5. 5
   To express understanding.
6. 6
   The sound of one screaming (with as many a's or h's as needed for emphasis).

Noun

1. 1
   Expression of amazement, surprise, enthusiasm, or fear.
2. 2
   Expression of joy and/or pleasure.
3. 3
   The exclamation aah.

Verb

1. 1
   To say or exclaim aah: To express amazement or surprise or enthusiasm, especially by the interjection aah.
2. 2
   To say or exclaim aah: To express joy or pleasure, especially by the interjection aah.

Proper noun

1. 1
   Initialism of aquatic ape hypothesis.