OS /; AmE / abbr

1 (IT ) = OPERATING SYSTEM

2 (Commerce , only used in written English) (also spelled O/S)

out of stock ⇨ STOCK noun (1)

3 (Accounting ) (also spelled O/S)

a short way to write outstanding in financial records

4 (Commerce , usually used in written English)

(about clothes) outsize

• Hague Rules
• haircut
• half-day
• half day
• half-dozen
• half-page
• half point
• half-price
• half-year
• half-yearly
• hallmark
• hall test
• halo effect
• hammer
• hammering
• hand
• handbill
• handbook
• handcraft
• hand-held
• hand-holding
• handicraft
• handle
• handler
• handling