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Webster 1913 Edition

Adj.

Pertaining to, or treating of, an institution or institutions;

as,

institutional

legends

Institutional

writers as Rousseau.

J. S. Mill.

Instituted by authority.

Elementary; rudimental.

Adj.

Enjoined; instituted by authority.

institutional ‎(comparative more institutional, superlative most institutional)

Of, pertaining to, characteristic of, or organized along the lines of an institution.
Instituted by authority.
Elementary; rudimentary.

of pertaining to or characteristic of an institution

instituted by authority

rudimentary — see rudimentary