What is the meaning of -ia?

Used to form taxonomic names, especially to form genus names when appended to the name of a person, usually a scientist or a patron.

Used in forming names of countries, diseases, flowers, and rarely collections of things (such as militaria, deletia).

Used in forming plurals of nouns in -ium and -ion.

forms nouns, from adjectives, denoting states, conditions and qualities; -ness; -ity; -y; -hood

forms the names of offices or jobs; -ship

forms placenames; -y; -ia

Forms primarily transitive verbs describing repeating (frequentative) or continuous (continuative) action.

Forms place names.

-y (forms abstract nouns from Latin or Greek roots)

Forms some adverbs, mainly with a directional meaning.

Alternative form of -ea

Used to form continuative verbs from other verbs.

Used to form transitive verbs describing a continuous action with a nominal.

Used to form intransitive verbs describing the creation of a nominal.

Used to form adjectives from nouns and verbs.

forms nouns from ethnonyms or personal names, denoting a country, province or region; -ia, -y

forms nouns from nouns, denoting a quality, status or jurisdiction; -y, -cy,-ness, -ity, -hood

forms nouns from nouns, denoting an art, science, practice or establishment; -y

derives abstract nouns denoting a state or condition from adjectives or nouns

derives abstract nouns denoting a collective group or a social condition

added to ethnonyms to derive place names

used to derive technical and scientific terms, especially from Ancient Greek terms

derivative suffix (Can we clean up this sense?)

Used to form a first declension feminine abstract noun, usually from an adjective ending in -us, or (rarely in later Latin) one ending in -ius, or from a present participle stem, and occasionally from a root noun.

Used to form country names

nominative/accusative/vocative neuter plural of -s

a passive ending

-ia

forms nouns, from adjectives, denoting states, conditions and qualities; -ness; -ity; -y; -hood

forms the names of medical conditions; -y; -ia

forms the names of offices or jobs; -ship

forms placenames; -y; -ia

a suffix indicating the first-person singular indicative imperfect of a verb in -er and -ir

a suffix indicating the third-person singular indicative imperfect of a verb in -er and -ir

appended to the infinitive, forms the first-person singular and third-person singular conditional of verbs

definite singular of -ie, usually applied to place names.

appears in feminine nouns, generally abstract, mostly inherited from Latin; -y

forms placenames; -y; -ia

for (directed at, intended to belong to), applicative suffix

Source: wiktionary.org