This is the 6338th most frequent Swedish word.
liliia
"Liliia" is not a Swedish word. It might refer to a name or require clarification.
Here 'lilja' is used as a noun referring to a type of flower, the lily.
Jag såg en blomma som hette lilja i trädgården.
I saw a flower called 'lily' in the garden.
In this sentence, 'lilja' is transformed into 'Liljan', a definite form referring specifically to 'the lily' as a symbolic object.
Liljan symboliserar renhet och oskyldighet.
The lily symbolizes purity and innocence.
Here 'liljor' is the plural form of 'lilja', used to refer to multiple lilies.