| Acronym | Definition |
|---|
| Ath | athlete |
| Ath | All Time High |
| Ath | Atherosclerosis |
| Ath | Above the Horizon |
| Ath | Around the Horn (ESPN show) |
| Ath | Aluminum Trihydrate |
| Ath | A Toda Hora (Spanish: At All Times; Puerto Rico automatic teller machine) |
| Ath | Associate of Theology (various schools) |
| Ath | Attention Hangup |
| Ath | Authorization to Hire |
| Ath | American Trading House (Newark, NJ) |
| Ath | Ask the Headhunter (est. 1995) |
| Ath | Adenotonsillar Hypertrophy |
| Ath | Air Transportable Hospital |
| Ath | Athwartship |
| Ath | Acceleration Time History |
| Ath | Abdominal Total Hysterectomy (surgery) |
| Ath | Avian Thymic Hormone |
| Ath | Armchair Treasure Hunt (UK) |
| Ath | Absolute Threshold of Hearing |
| Ath | Automatic THrottle |
| Ath | Attention Hang-Up |
| Ath | Andrews Travel House (UK) |
| Ath | Assign Thresholds (US DoD) |
| Ath | Artificial Time History |
| Ath | Asia Timber House (Malaysia) |
| Ath | Air Transat Holidays |
| Ath | Addicted to Hardstyle |
| Ath | Abbreviated Trouble History |
| Ath | Athens, Greece - Hellinikon (Airport Code) |
| Ath | Arts Theme House (Duke University; Durham, NC) |
| Ath | Applications Techniques Hydrauliques (French hydraulics company) |
| Ath | Armored Trooper Heavy (Votoms) |
| Ath | Air Touraine Hélicoptère (French helicopter transportation company) |
| Ath | AUTODIN Transitional Hub |
| Ath | Algorithm Test Harness |
| Ath | Axially Tilted Hyperbola (antenna) |
| Ath | Anders Tang Humor |