2. come or toward the direction or place of, particularly for a particular purpose: concerns came at us from every sides.

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7. come or making use of the rate, extent, or amount of; come the suggest of: at 30 cent a pound; at high speed; in ~ 20 paces; in ~ 350°F.
4. engaged in; in a state that (being): children at play; stand at ease; that is at his most charming today.
5. (in expressions involved with habitual activity) during the happen of (esp in the phrase at night): he provided to job-related at night.
2. (used to suggest a ar or position, together in time, on a scale, or in order): at age 65; at zero; in ~ the end.

If you want to cite the building where other is or whereby something happens, you commonly use at.

In brother English, friend say that someone is at college or at university as soon as you desire to say the they research there.

2. time

At is likewise used to say when something happens.

You use at when you are mentioning a precise time.

If you desire to recognize the an exact time as soon as something occurred or will happen, you deserve to say "At what time...?" but people normally say "What time..."" or "When...?"

However, girlfriend say that something happened or will take place "in the morning", "in the afternoon", or "in the evening".

If something happens at a meal time, it happens while the meal is gift eaten.

At - a very unstable radioactive aspect (the most heavy of the halogen series); a decay product that uranium and thorium
chemical element, facet - any of the much more than 100 known substances (of i m sorry 92 take place naturally) that cannot be separated into less complicated substances and that singly or in combination constitute all matter
halogen - any of 5 related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that space all monovalent and also readily form negative ions

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(specifying turbulent location) → enthere weren"t many human being at the party/lecture → no había mucha gente en la fiesta/conferenciaat the hairdresser"s/supermarket → en la peluquería/el supermercadoat the office → en la oficinaat college → en la escuela, en el colegioat sea → en el marat table → en la mesaBUT in ~ John"s → en casa de Juanwhere it"s at Glasgow"s whereby it"s at → en Glasgow es donde está la movida, en Glasgow es donde está el rollo (Sp) where we"re at I"ll just run with where we"re in ~ → te voy a poner al tanto or al corriente de cuál es la situación
1.2. (specifying position)my room"s at the earlier of the house → mi dormitorio está en la parte de atrás de la casathe dress fastens at the back → el vestido se abrocha por detrásat the bottom the the stairs → al pie de ras escalerasto stand at the door → estar de pie or (LAm) parado en la puertaat the edge → en el bordemy room"s in ~ the front of the house → mi dormitorio está en la parte delantera de la casathe dress fastens at the front → el vestido se abrocha por delanteat the top (gen) → en lo alto; (of mountain) → en la cumbreto be in ~ the window → estar junto a la ventanahe came in at the home window → entró por la ventana