1. DH - Noun
2. DH - Proper noun
(baseball) Initialism of designated hitter.
(aviation) Initialism of decision height.
(military, nautical) Initialism of heavy destroyer, a variant of the destroyer type of warship.
Initialism of deputy head.
Initialism of dear/darling husband.
Department of Health
Abbreviation of Diffie–Hellman (key exchange).
Source: en.wiktionary.org