OSA
Abbreviation with 3 meanings
| Stands for | Obstructive sleep apnea |
|---|---|
| Meanings | 3 |
| Categories | Medical, Business & Finance, Religion |
OSA has three meanings. The most common are Obstructive sleep apnea (respiratory) and On-shelf availability (e-commerce & retail); it can also stand for Order of Saint Augustine.
Meanings of OSA at a glance
| # | OSA stands for | Context |
|---|---|---|
| 1 | Obstructive sleep apnea | Medical › Respiratory |
| 2 | On-shelf availability | Business & Finance › E-commerce & Retail |
| 3 | Order of Saint Augustine | Religion › Religious Title |
1. Obstructive sleep apnea
Medical · Respiratory Abbreviations
Sleep disorder in which the upper airway repeatedly collapses during sleep, causing pauses in breathing, oxygen drops and frequent awakenings. Symptoms include loud snoring, witnessed apneas, morning headaches and daytime sleepiness, and it raises the risk of hypertension, atrial fibrillation, stroke and car crashes.
Example: Severe OSA, AHI 42 with nadir SpO2 78%; CPAP at 10 cm H2O ordered.
A 2019 analysis estimated that nearly 1 billion adults worldwide have OSA, most undiagnosed. Severity is graded by the apnea-hypopnea index: 5 to 14 mild, 15 to 29 moderate, 30 or more severe. CPAP is first-line, with oral appliances, weight loss, positional therapy and hypoglossal nerve stimulation as alternatives; tirzepatide was approved in 2024 for moderate to severe OSA with obesity. The STOP-BANG questionnaire screens for it.
2. On-shelf availability
Business & Finance · E-commerce & Retail Abbreviations
Percentage of time a product is present and available on the store shelf when shoppers look for it, the positive counterpart of the out-of-stock rate and a common metric in supplier-retailer scorecards.
Example: The supplier's OSA target is 98% across all stores.
Products can show as in stock in the system yet be missing from the shelf because they sit in the backroom, so OSA is often measured by shelf audits or image recognition.
3. Order of Saint Augustine
Religion · Religious Title Abbreviations
Augustinian friars belong to an order formed in 1256 by uniting groups of hermits who followed the Rule of St. Augustine. Pope Leo XIV, elected in 2025, is an Augustinian.
Example: Villanova University was founded by Augustinian friars in 1842 and its president is often an OSA.
Martin Luther was an Augustinian friar before the Reformation, and geneticist Gregor Mendel was an Augustinian friar and abbot in Brno. From the Latin Ordo Sancti Augustini. Several other congregations, such as the Augustinians of the Assumption (AA), share the name.
Related abbreviations
More respiratory abbreviations
- NIV – Noninvasive ventilation
- NRB – Nonrebreather mask
- NSIP – Nonspecific interstitial pneumonia
- OHS – Obesity hypoventilation syndrome
- P/F – PaO2/FiO2 ratio
- PAH – Pulmonary arterial hypertension
- PAP – Positive airway pressure
- PE – Pulmonary embolism
See all 109 respiratory abbreviations →
More e-commerce & retail abbreviations
- NWT – New with tags
- OBO – Or best offer
- OMS – Order management system
- OOS – Out of stock
- OTB – Open to buy
- P&P – Postage and packing
- PDP – Product detail page
- PIM – Product information management
See all 75 e-commerce & retail abbreviations →
This entry is for general education and is not medical advice. Abbreviation use varies between institutions; always confirm in context.