What is the meaning of тебе?

full form of the second-person singular pronoun in the accusative case, used as the direct object of a verb; you

the second-person singular pronoun in the prepositional case, used as the object of a preposition; you

full form of the second-person singular pronoun in the dative case, used as the indirect object of a verb; to you, for you, you

Long direct object form of ти (ti).

Long indirect object form of ти (ti).

genitive of тꙑ (ty)

dative/prepositional of ты (ty)

Archaic feminine form: оне́ (oné).

The letter г (g) in the genitive/accusative case ending is pronounced as /v/.

The alternative forms starting with н- (n-) are used after a preposition.

Archaic forms: ея́ (jejá), нея́ (nejá).

Instrumental forms ending in (-ju) are either dated, poetic, or dialectal.

The prepositional case is never used without a preposition.

of you (genitive singular of ти̑ (you))

you (accusative singular of ти̑ (you))

genitive/accusative of ти (ty)

Source: wiktionary.org