Alternative spelling of posthaste

(now rare) Alternative form of postehaste

(intransitive, dated) To hurry or hasten.

A great hurry.

(idiomatic) To do things in a deliberate manner to reduce mistakes.

Being too hasty leads to wasteful mistakes.

Getting married too soon will lead to a bad marriage. / Joining (or merging) two things together too soon will lead to problems.

When one is in a hurry, one often ends up having less success and completes a task more slowly.

Doing things too quickly results in mistakes.

(mineralogy) A monoclinic-prismatic mineral containing aluminum, calcium, hydrogen, iron, oxygen, silicon, and sodium.