SEU

Seu is a possessive determiner and, in some contexts, a possessive pronoun in Portuguese. It corresponds to “your” when referring to the person addressed, or to third-person possessors as in “his,” “her,” or “its,” depending on context. The forms are seu (masculine singular) and sua (feminine singular), with plural forms seus and suas. In standard usage, seu and sua normally precede the noun, as in o seu carro (your car / his car, depending on context). To avoid ambiguity, especially in Brazilian Portuguese, speakers sometimes replace or supplement these forms with de você, dele, or dela.

Usage and variation:

In Brazilian Portuguese, você is treated as a third-person pronoun, so seu/ sua can indicate possession by the person being addressed or by another third person, depending on context. This has led to frequent ambiguity in informal speech; many speakers prefer using dele/dela or de você when clarity is needed. In European Portuguese, o seu / a sua is more commonly interpreted as belonging to a third person (ele/ela) or to the addressee, with some regional variation. Teu and tua are the second-person possessives used in contexts with informal tu, and their use varies by region.

Placement and agreement:

The possessive forms agree with the noun they modify in gender and number, not with the possessor. For example: o seu colega (your colleague / his colleague), a sua casa (your house / his house). Possessive pronouns can also be used in place of the noun, though this is less common in everyday speech.

Acronym:

SEU, when capitalized, may refer to technical terms such as Single Event Upset, a radiation-induced change of state in electronic devices, or to other domain-specific abbreviations. Context determines the intended meaning.