Plural of ah, the interjection of mild surprise or delight.

• Often used in the phrase oohs and ahs.

Third-person singular simple present of ah.

• He or she utters the sound ah.

Initialism for several medical syndromes.

• Alien hand syndrome; allopurinol hypersensitivity syndrome; athletic heart syndrome.

Initialism for ampere-hour(s), a unit of electric charge.