by
[baɪ]preposition
| 1. | [indicating cause, agent]
  por caused/written by causado/escrito por a book by Joyce un libro de Joyce | 
| 2. | [indicating means, method, manner] to travel by bus/train/plane/ship viajar en autobús/tren/avión/barco to pay by cheque pagar con cheque to take somebody by the hand coger a alguien de la mano by candlelight a la luz de las velas he got rich by buying land se hizo rico comprando terrenos by nature por naturaleza by profession/trade de profesión/oficio | 
| 3. | [beside, close to]
  junto a by the sea junto al mar | 
| 4. | [past]
  por delante de to walk by somebody/something pasear por delante de alguien/algo we drove by the castle pasamos por el castillo (conduciendo) | 
| 5. | [via, through]
  por we entered by the back door entramos por la puerta trasera | 
| 6. | [with time - at or before, during]
  para I'll be there by eight estaré allí para las ocho by 1916 it was all over en 1916 ya todo estaba decidido by now ya by day/night por el día/la noche, de día/noche | 
| 7. | [according to]
  según by law/my standards según la ley/mis criterios | 
| 8. | [in division]
  entre [in multiplication, measurements] por to divide 20 by 2 dividir 20 entre 2 to multiply 20 by 2 multiplicar 20 por 2 twelve feet by ten doce pies por diez | 
| 9. | [in quantities, amounts]
  por by the thousand or thousands por miles by the metre por metros by the day/hour por día/horas prices were cut by 50% los precios fueron rebajados (en) un 50% | 
| 10. | [indicating gradual change] day by day día a día one by one uno a uno | 
| 11. | [to explain a word or expression]
  con, por what do you mean by `all right'? ¿qué quieres decir con `bien'? what do you understand by the word `subsidiarity'? ¿qué entiendes por `subsidiariedad'? | 
| (all) by oneself
  solo ( f 
 sola) did you do it all by yourself? ¿lo hiciste tú solo? | 
 
                             
                             
                             
                             
             
             
                 
                