with the greatest possible speed or promptness:
to come to a friend’s aid posthaste.
Archaic. great .
with great haste; as fast as possible
(archaic) great haste
1590s, from a noun (1530s) meaning “great speed,” usually said to be from “post haste” instruction formerly written on letters (attested from 1530s), from post (adv.) + haste (n.). The verb post “to ride or travel with great speed” is recorded from 1550s.
Immediately, with great speed: “Get the flood warning to the media posthaste.”
- Posthepatitic cirrhosis
posthepatitic cirrhosis post·hep·a·tit·ic cirrhosis (pōst’hěp-ə-tĭt’ĭk) n. See active chronic hepatitis.
posthioplasty pos·thi·o·plas·ty (pŏs’thē-ə-plās’tē) n. Reparative or plastic surgery of the prepuce.
posthitis pos·thi·tis (pŏs-thī’tĭs) n. Inflammation of the prepuce.
[pohst hohk; English pohst hok] /ˈpoʊst ˈhoʊk; English ˈpoʊst ˈhɒk/ adverb, Latin. 1. after this; afterward. /ˈpəʊst ˈhɒk/ noun 1. (logic) the fallacy of assuming that temporal succession is evidence of causal relation Latin, “after this.” Especially in post hoc, ergo propter hoc, logical fallacy, literally “after this, therefore because of this.”