La or în for location?

Romanian can describe the same broad destination with different place prepositions depending on the meaning: Sunt în bibliotecă. (I am inside the library.) but Merg la bibliotecă. (I am going to the library.) The choice is lexical and semantic, not a word-for-word copy of English in or at.

What is the basic contrast between la and în?

Use în when the place is understood as an interior or geographic area; use la when it is treated as an institution, activity, point, person, or conventional setting. A city can therefore take în when its urban area is foregrounded and la when it is framed as an event location or destination. These are useful starting meanings, not absolute translations: the noun and the intended focus matter.

When does Romanian use la?

Choose la when the noun names an institution, an activity, a service, a person’s place, or a point rather than an interior that you want to describe. The same choice can express location with a fi or destination with a movement verb.

• Institutions and activities: la școală, la universitate, la facultate, la curs, and la serviciu can mean at school, at university, in class, or at work as an activity or institution.
• Services and people: la medic (at the doctor’s), la Ana (at Ana’s place / with Ana), and la bancă (at the bank) use a place or service reading.
• Points and nearby positions: la ușă (at the door), la fereastră (by the window), and la masă (at the table / at a meal) are conventional point or setting expressions.
• A destination keeps la when the destination is the institution or activity: Merg la curs. (I am going to class.) The physical interior can be stated separately: Merg în sala de curs. (I am going into the classroom.)

When does Romanian use în?

Choose în for an inside relation, a container, or a geographic area. Locuiesc în București (I live in Bucharest) foregrounds the urban area, and countries normally keep în for both location and destination: Merg în România. (I am going to Romania.) A city can instead take la when treated as a point or destination: Merg la București. (I am going to Bucharest.)

• Interiors and containers: în casă, în cameră, în sertar, în cutie, and în geantă describe something inside a space or container.
• Settlements and countries as areas: în București, în Cluj, în România, and într-o țară mică use în for the named geographical area. Event and destination readings can instead frame a city as a point with la, as in o conferință la București or Merg la București.
• Other areas can also take în: în parc (in the park), în pădure (in the forest), and în oraș (in the city) are area readings, even though English may use at in another sentence.
• A physical destination can be made explicit with în: Pun cartea în sertar. (I put the book in the drawer.) This focuses on the object ending up inside the container.

How do noun definiteness and într-un work after în?

The preposition în does not choose definiteness by itself. Use the noun phrase that matches the meaning: a bare or established form, an indefinite form, or the ordinary definite form. Before a singular indefinite article, în combines with the article as într-un or într-o.

Compare într-o cameră (in a room) with în camera mea (in my room) and în camerele hotelului (in the hotel rooms). The definite article remains part of the ordinary noun form after în; it does not become an English-style separate word. For the wider article system, see the Romanian definite article.

Does the verb decide between location and destination?

No. The verb gives the situation its time and movement, while the preposition keeps its place meaning. Sunt în România. describes location and Merg în România. describes destination, but both use în. Likewise, Sunt la școală. and Merg la școală. keep la while the verb changes the sentence from location to destination.

What are the conventional choices?

Some expressions are conventional lexical choices, so their English gloss is not a reliable selector. Learn these neutral contemporary Standard Romanian phrases as units:

• la țară means in the countryside, while în țară usually means in the country or within the country; the noun and meaning are different.
• la universitate, la facultate, and la școală are institutional or activity expressions. Use în when the inside of a building or area is the focus, as in în clădirea școlii (inside the school building).
• la fereastră means by the window, and la masă means at the table or at a meal; these are not container interiors.
• acasă means at home or home and normally appears without la or în: Sunt acasă. (I am at home.) and Merg acasă. (I am going home.)

Mistakes to avoid

• Do not translate every English at as la: în parc is the neutral Romanian phrase for in the park, while la școală is the institutional phrase for at school.
• Do not translate every English in as în: la țară means in the countryside, and la fereastră means by the window.
• Do not change the preposition merely because the verb changes from location to movement: compare Sunt în România with Merg în România, and Sunt la universitate with Merg la universitate. With cities, however, în and la can reflect an area-versus-point distinction.
• Do not make în responsible for the article: compare într-un sertar, în sertarul de sus, and în sertare; the noun phrase controls indefiniteness and number.