Herkese Merhaba

Is there any difference between these two sentences:

O akşam yemği yaptı
O akşam yemeklerini yaptı

My Turkish isn´t great. But I think the second one is: 

He/She cooked his/her meals that night. 

Yemek+ler+in+i

Food+plural+possessive+object

S/he cooked a dinner.  (There is perhaps an element of surprise or emphasis here.  The regular format would be "Akşam yemeğini yaptı".  By adding the "O" at the beginning, you´re stressing that.

S/he cooked the dinners.  (Ditto.)  BTW, *all* the dinners.

Thank you very much for the clarification, so we have indefinite object in the first sentence but definite object in the second one, right?

hmmm - why wouldn´t S/he cooked the dinners be: O akşam yemekleri yaptı ?

I think in both cases we´re using definite objects. Indefinite would be: O akşam bir yemek yaptı.

O akşam yemeği yaptı = he cooked a dinner ("akşam yemeği" is indefinite)

O akşam yemeğini yaptı = he cooked the dinner (definite object)

Plural cases:

O akşam yemekleri yaptı = he cooked dinners

O akşam yemeklerini yaptı = he cooked the dinners

I get it now - dinner - akşam yemeği. Sorry. I thought yemek was dinner and then akşam reffered to that night.

Sorry