старое

In a sentence

• Это старое здание привлекает многих туристов.

  This old building attracts many tourists.

  Here, "старое" is an adjective modifying "здание" (building) to indicate its age or antiquity.

• Я нашёл своё старое фото из детства.

  I found my old photo from childhood.

  In this sentence, "старое" describes "фото" (photo), signifying that it is from a previous time.

• Я предпочитаю старое, потому что оно кажется более надежным.

  I prefer the old, as it seems more reliable.

  Here, "старое" functions as a nominalized adjective, representing "something old."