What is the meaning of -eria?

Used to create collective nouns.

-ery (place of art, craft or practice)

forms nouns from nouns, denoting a place where the root is prepared, kept or sold; -ery, shop, store

forms nouns from nouns, denoting a craft, practice or product of such; -ery, -work

forms nouns from nouns, denoting behaviour; -ery, -age, -ism

added to nouns to form other nouns meaning "place of" (an art, craft, or practice)

-ery (behavior characteristic of)

-ery (class, group, or classification of)

↑ May be better understood as "couch potatery," although this uses a nonce word.

-ery, Added to nouns to form other nouns meaning "a class, group, or collection of."

-ery, added to nouns to form other nouns meaning "behavior characteristic of."

forms the names of places where the suffixed product is produced or sold, or the suffixed service is provided; -ery

Source: wiktionary.org