Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “fastness”

See all translations

fastness

noun uk   /ˈfɑːst.nəs/ us    /ˈfæst-/

fastness noun (FIXED)

[U] how fast (= fixed) something is: Test clothes for colour fastness before washing.

fastness noun (SAFE PLACE)

[C] literary a safe place, such as a fortress : a mountain fastness
Translations of “fastness”
in Chinese (Traditional) 固定, 牢固性, 不褪色性…
in Chinese (Simplified) 固定, 牢固性, 不褪色性…
(Definition of fastness from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of fastness?
Add Cambridge dictionaries to your browser to your website

Word of the Day

glacial

made or left by a glacier

Word of the Day

Let’s celebrate! (words and phrases for parties)

by Kate Woodford,
December 17, 2014
​​​ With Christmas and New Year almost upon us, we thought it a good time to look at the language of parties and celebrations. First, let’s start with the word ‘party’ itself. To have or throw a party or, less commonly, to give a party is to arrange a party: We’re having a

Read More 

cinderella surgery noun

December 15, 2014
cosmetic surgery to the feet We have all heard of people having nose jobs, boob jobs and liposuction – but now a new trend growing in popularity in America: Cinderella surgery.

Read More