"The uniform is mine."
Translation:O uniforme é meu.
Not really. My = meu, minha, meus, minha. Meu is used for masculine words and minha for feminine ones. Meus and minhas are their plural forms. If you want to change it into possessive pronoun (mine) you sometimes jse the definite article. O meu uniforme = my uniform (masculine form) / o uniforme é meu =the uniform is mine.