- The definition of fast is someone or something that moves quickly, is not easily moved or is firmly shut.
- An example of fast is the cheetah's running speed.
- An example of fast is a door that is stuck closed.
- Fast is defined as swift or ahead of time.
- An example of fast is someone driving 50 in a 30 mph zone.
- An example of fast is a printer getting a project completed a day early.
- A fast is defined as a period of time during which you go without food.
An example of fast is not eating during daylight hours for Ramadan.
- Fast means to eat little or no food.
An example of fast is not eating for twelve hours before having blood drawn.
The cheetah is very fast.
fast definition by Webster's New World
- not easily moved, freed, or separated; firm, fixed, or stuck: the ship was fast on the rocks
- firmly fastened or shut: make the shutters fast
- loyal; devoted: fast friends
- that will not fade: fast colors
- rapid in movement or action; swift; quick; speedy
- permitting or facilitating swift movement: a fast highway
- taking or lasting a short time: a fast lunch
- showing or keeping to a time in advance of a standard or scheduled time: his watch is fast
- living in a reckless, wild, dissipated way: a fast crowd
- promiscuous sexually
- ☆ Informal glib and deceptive: a fast talker
- Slang acting, gotten, done, etc. quickly and often dishonestly: out for a fast buck
- Bacteriology resistant to dissolution or decolorization, as certain bacteria
- Photog. adapted to or allowing very short exposure time: a fast lens, fast film
- Now Dial. complete; sound: a fast sleep
Origin: Middle English ; from Old English fæst, akin to German fest, firm, stable ; from Indo-European base an unverified form pasto-, fixed, secure from source Armenian hast
- firmly; fixedly
- thoroughly; soundly: fast asleep
- rapidly; swiftly; quickly; speedily
- ahead of time
- in a reckless, dissipated way; wildly
- Old Poet., Obsolete close; near: fast by the river
Origin: ME faste < OE fæste < adj.
- to abstain from all or certain foods, as in observing a holy day
- to eat very little or nothing
Origin: Middle English fasten ; from Old English fæstan, akin to German fasten, Gothic fastan, literally , hold fast ; from base of fast
- the act of fasting
- a day or period of fasting
fast definition by American Heritage Dictionary
adjective fast·er, fast·est
- Acting, moving, or capable of acting or moving quickly; swift.
- a. Accomplished in relatively little time: a fast visit.b. Acquired quickly with little effort and sometimes unscrupulously: made a fast buck scalping tickets.
- Quick to understand or learn; mentally agile: a class for the faster students.
- Indicating a time somewhat ahead of the actual time: The clock is fast.
- Allowing rapid movement or action: a fast running track.
- Designed for or compatible with a short exposure time: fast film.
- a. Disposed to dissipation; wild: ran with a fast crowd.b. Flouting conventional moral standards; sexually promiscuous.
- Resistant, as to destruction or fading: fast colors.
- Firmly fixed or fastened: a fast grip.
- Fixed firmly in place; secure: shutters that are fast against the rain.
- Firm in loyalty: fast friends.
- Lasting; permanent: fast rules and regulations.
- Deep; sound: in a fast sleep.
- In a secure manner; tightly: hold fast.
- To a sound degree; deeply: fast asleep.
- In a rapid manner; quickly.
- In quick succession: New ideas followed fast.
- Ahead of the correct or expected time: a watch that runs fast.
- In a dissipated, immoderate way: living fast.
- Archaic Close by; near.
Origin: Middle English, from Old English fǽst, firm, fixed; see past- in Indo-European roots.
intransitive verb fast·ed, fast·ing, fasts
- To abstain from food.
- To eat very little or abstain from certain foods, especially as a religious discipline.
- The act or practice of abstaining from or eating very little food.
- A period of such abstention or self-denial.
Origin: Middle English fasten, from Old English fǽstan; see past- in Indo-European roots.
fast - Computer Definition
A specification from the ATM Forum (July 2000) that defines the mechanisms and procedures required to support the transport of variable-length New York Seattle Terminals Front-End Processor Mainframe host datagrams, known as ATM frames, over an ATM infrastructure using SONET/SDH facilities. FAST is similar to Data Exchange Interface (DXI) and Frame User Network Interface (FUNI), which are designed for access to an ATM network over relatively low-speed plesiochronous transmission facilities. FAST, however, is designed for access and/or inter-switch trunking over very high speed SONET/SDH transmission facilities. See also ATM, ATM Forum, datagram, DXI, frame, FUNI, plesiochronous, SDH, and SONET.
An asynchronous communications protocol used to quickly transmit files over high-quality lines. Error checking is done after the entire file has been transmitted.
fast - Phrases/Idioms
a fast oneâ
play fast and loose
break one's fast