Definition
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upon
A preposition used to indicate a position on a surface or at a specific point in time.
A preposition used to indicate a position on a surface or at a specific point in time.
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The book is placed upon the table.
El libro está colocado sobre la mesa.
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Upon entering the room, she noticed the beautiful decorations.
Al entrar en la habitación, notó las hermosas decoraciones.
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He made a promise upon his arrival.
Hizo una promesa a su llegada.