standard
stan-dard
noun
A required or desired level of quality, achievement, or measure.
"They aim for a high standard."
adjective
Used or accepted as normal, typical, or average; not special.
"This is the standard procedure."
Thesaurus
Synonyms: acceptable, received, classical, banner, basic, casebook, canonic, canonical, authoritative, definitive, criterional, textbook
Antonyms: nonstandard