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noun. a rate (usually rapid) at which something happens. synonyms: speed, swiftness. see more. (computer science) the speed with which a computational device can execute instructions; measured in MIPS. the quality of being gradual or of coming about by gradual stages.
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Definition of 'fastness' fastness. (fɑːstnəs , fæst- ) Word forms: fastnesses. countable noun. A fastness is a place, such as a castle, which is considered safe because it is difficult to reach or easy to defend against attack. [literary] They could have withdrawn into the mountain fastness of Eryri. Collins COBUILD Advanced Learner’s Dictionary.
What does the noun fastness mean? There are 11 meanings listed in OED's entry for the noun fastness , five of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.
Definition of fastness noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
A complete guide to the word "FASTNESS": definitions, pronunciations, synonyms, grammar insights, collocations, examples, and translations.
fastness meaning, definition, what is fastness: a place that is safe because it is diffi...: Learn more.
fastness (countable and uncountable, pl. fastnesses) A secure or fortified place; a stronghold , a fortress A Princess of Mars: " The incubators are built in remote fastnesses , where there is little or no likelihood of their being discovered by other tribes.