olemus
(a) ajaühikus arvutatav räside arv,
näiteks parooli jõuründe programmis
https://security.stackexchange.com/questions/152339/password-cracking-speeds-according-to-hashcat

(b) Bitcoini kontekstis:
ajaühikus loodavate toimingutõendräside maksimaalarv
Wiktionary:
1. (computing, cryptocurrencies) the number of proof of work hashes that a mining computer can make in a given period of time, usually a second
https://en.bitcoinwiki.org/wiki/Hashrate
https://www.techopedia.com/definition/33142/hash-rate