serious

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective serious is

without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn.

As a verb servere

is .

As an adjective serious is

without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn.

As adjectives the difference between serious and large

is that serious is without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn while large is of considerable or relatively great size or extent.

As a noun large is

(music|obsolete) an old musical note, equal to two longas, four breves, or eight semibreves.

As adjectives the difference between proper and serious

is that proper is (lb) suitable while serious is without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn.

As an adverb proper

is (scotland) properly; thoroughly; completely.

Happygolucky is likely misspelled.

Happygolucky has no English definition.

As an adjective serious is

without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn.

As adjectives the difference between stern and serious

is that stern is having a hardness and severity of nature or manner while serious is without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn.

As a noun stern

is the rear part or after end of a ship or vessel.

Serious is a antonym of sincere.

As adjectives the difference between sincere and serious

is that sincere is genuine; meaning what one says or does; heartfelt while serious is without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn.

As adjectives the difference between serious and faithful

is that serious is without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn while faithful is loyal; adhering firmly to person or cause.

As a noun faithful is

the practicing members of a religion or followers of a cause.