general (adj.)

c. 1200, "of wide application, generic, affecting or involving all" (as opposed to special or specific), from Old French general (12c.) and directly from Latin generalis "relating to all, of a whole class, generic" (contrasted with specialis), from genus (genitive generis) "stock, kind" (from PIE root *gene- "give birth, beget," with derivatives referring to procreation and familial and tribal groups).

What is common is of frequent occurrence. What is general admits of comparatively few exceptions: the general opinion (the opinion of the majority); the general welfare. [J.H.A. Günther, "English Synonyms Explained & Illustrated," Groningen, Netherlands, 1904]

Used in forming titles from late 14c. with the sense "having general authority or jurisdiction, chief." Phrase in general "without exception, in one body; as a rule, generally, not specifically" is from late 14c. General rule, one applying to an art or science as a whole, is from c. 1400. General store attested by 1810, American English, in reference to the range of goods sold; a general hospital (1737) is one not restricted to one class of persons or type of disease.

general (n.)

late 14c., "whole class of things or persons, a broad classification, a general truth," from general (adj.). Meaning "commander of an army" is 1570s, shortening of captain general, from French capitaine général. The English adjective was affixed to civic officer designations by late 14c. to indicate superior rank and extended jurisdiction.

Definitions of general
general (adj.)
applying to all or most members of a category or group;
comprehensible to the general reader
a general rule
in general terms
the general public
general assistance
general (adj.)
not specialized or limited to one class of things;
general studies
general knowledge
general (adj.)
prevailing among and common to the general public;
the general discontent
general (adj.)
affecting the entire body;
general symptoms
a general anesthetic
general (adj.)
somewhat indefinite;
bearing a general resemblance to the original
a general description of the merchandise
general (adj.)
of worldwide scope or applicability; "the shrewdest political and ecumenical comment of our time"- Christopher Morley;
Synonyms: cosmopolitan / ecumenical / oecumenical / universal / worldwide / world-wide
general (n.)
a general officer of the highest rank;
Synonyms: full general
general (n.)
the head of a religious order or congregation;
Synonyms: superior general
general (n.)
a fact about the whole (as opposed to particular);
he discussed the general but neglected the particular
general (v.)
command as a general;
We are generaled by an incompetent!