(countable) Something that is fast, or that causes someone or something to be fast (in various senses).
(countable) Something that is fast, or that causes someone or something to be fast (in various senses).
Add your own interpretation of "fastness".
UK and Irish slang — Cockney, Scouse, Geordie, Yorkshire, Glaswegian, Brummie, Welsh, West Country, plus Irish English. Centuries of regional dialects feeding into modern British and Irish street talk.
See all British & Irish slang slang on Slangora.
Browse all slang words starting with F.
A rapidity of motion.
(chiefly, US, idiomatic, set phrase) A period of time characterized by quickly-paced activity, especially involving extravagant or risky conduct, sexual behavior, or other exciting events.
(slang, mostly, in the phrase pull a fast one) A trick or deception.
(slang) A speedboat.
(uncountable) The quality or state of being fast (in various senses).
"fastness" means: The quality or state of being fast (in various senses).. This is a fairly neutral word with no inherent risk attached. There is no real cause for parental concern; it is descriptive vocabulary rather than something dangerous. If your child uses it, context will usually make the meaning clear. A brief, curious question about where they heard it is generally enough to know whether to follow up.
"fastness" means: The quality or state of being fast (in various senses).. Register: neutral, standard English, usable in most everyday contexts. A common non-native mistake is to use the word in the wrong register, or to assume one fixed meaning when it is actually polysemous; always check the surrounding register and the audience before producing it yourself. In formal writing, prefer a neutral synonym or a short descriptive phrase, and use this word only when you have heard or read it being used naturally in a comparable context.