(grammar): noun case used to indicate means. It answers the question "how?", and in English, this is usually expressed by the prepositional phrase by means of, as in "by means of the house". Languages that use the instructive case include Finnish and (rarely) Estonian.

Alternative spelling of preinstructional

(computing) An assembly language instruction that uses only absolute addresses.

(computing) The steps that a central processing unit undertakes in order to process a single instruction, consisting of fetching, decoding, and executing the instruction in question and updating the program counter.

plural of instruction cycle

(education, sociolinguistics) A language used in teaching.

plural of medium of instruction

(law) An instruction to jurors telling them they may equate willful ignorance with actual knowledge.

Synonym of couldn't organise a piss-up in a brewery