saf
saf — noun
- safsingular
- safsplural
1. a type of fuel for aeroplanes, made from plant material or waste rather than fro
a type of fuel for aeroplanes, made from plant material or waste rather than from oil
Cyrus's airline now runs half its fleet on SAF made from used cooking oil.
collocation: run on SAF
The airport began offering SAF to all carriers flying long-haul routes.
Amira read that SAF can cut flight emissions by up to eighty percent.
Engineers tested the new engine with pure SAF before the first passenger flight.
Farid watched ground crew pump SAF into the wing tanks before take-off.
- biofuel
a broader term covering any fuel from living matter, not only for aircraft
- renewable jet fuel
same meaning as SAF but less common as an established term
- alternative aviation fuel
a wider category that includes synthetic fuels, not only bio-based ones
用法筆記
SAF is almost always written in capital letters as an acronym for Sustainable Aviation Fuel. It is used as a mass noun and does not take a plural form.
常見錯誤
2. a written short form of the word 'safety', used on signs, labels, and in officia
a written short form of the word 'safety', used on signs, labels, and in official documents
The factory posted a SAF reminder next to every machine on the floor.
Yael completed the SAF training before starting work at the warehouse.
SAF used as a written label in workplace training materials
All staff must follow SAF rules when handling chemicals in the lab.
The sign read 'SAF FIRST' in bold red letters above the workshop door.
Jisoo checked the SAF guidelines before operating the new cutting machine.
用法筆記
This abbreviation appears mainly in written form — on signs, labels, checklists, and documents — rather than in everyday speech. Distinguish from sense 1, where SAF refers to a type of fuel.
3. a written short form of 'strategic air force', used in military and historical c
a written short form of 'strategic air force', used in military and historical contexts
Rodrigo's grandfather served in the SAF during the Cold War years.
collocation: serve in the SAF
Captain Okonkwo spread the SAF mission charts across the long table in the briefing room.
Hugo pointed to the SAF badge on his grandfather's dusty flight jacket.
Nellie found old SAF documents in a box of her great-uncle's wartime letters.
用法筆記
A military term used mainly in historical and defence contexts. Rare in everyday English. Distinguish from sense 2, which is the abbreviation for 'safety' rather than 'strategic air force'.