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The Collaborative International Dictionary of English v.0.48 (gcide)

Instruction \In*struc"tion\, n. [L. instructio: cf. F.
instruction.]
[1913 Webster]
1. The act of instructing, teaching, or furnishing with
knowledge; information.
[1913 Webster]

2. That which instructs, or with which one is instructed; the
intelligence or information imparted; as:
(a) Precept; information; teachings.
(b) Direction; order; command. "If my instructions may be
your guide." --Shak.

3. (Computers) a segment of coded data that is interpreted by
a computer as a command to perform an operation or series
of operations. The term instruction is applied to both the
electronic form of the data as represented in and executed
by the computer, and to any line of written computer code
which is interpreted as one instruction by a compiler. A
{computer program} is comprised of one or more
instructions.

Note: Instructions as contained in a program are formulated
in a {programming language}, which may be an {assembly
language}, in which one instruction corresponds to one
command executed by the coputer, or in a {higher-level
programming language}, in which one instruction may
represent one of many instructions in {assembly
language}. Higher-level programming languages include,
for example, FORTRAN, ALGOL, ADA, C, "C", COBOL, and
JAVA; each of these languages have their own
distinctive set of allowable instructions.

Syn: command, statement, line of code, program line.
[PJC]

Syn: Education; teaching; indoctrination; information;
advice; counsel. See {Education}.
[1913 Webster]