What is the meaning of Dier?

One who dies.

animal

beast; brute

animal (any member of the kingdom Animalia)

her, their, the latter's (genitive feminine singular and genitive plural of die)

alternative form of duur

they

animal

inflection of die:

1. feminine genitive/dative singular
2. genitive plural

feminine genitive/dative singular

genitive plural

alternative form of der (“deer”)

present tense of die

animal

dry, dead

genitive plural of diera

animal

Source: wiktionary.org