long
The Italian word 'lungo' is used to describe an object, distance, or period of time that is of considerable length or duration. It is comparable to the English term 'long' and can be used in many of the same contexts.
The river is very long
This sentence uses 'lungo' as an adjective to describe the length of the river. In Italian, adjectives usually come after the noun they modify, similar to Spanish and unlike English.
I waited for a long period
In this sentence, 'lungo' is used as an adjective before 'periodo' to express a long duration. 'Periodo' could refer to any range of time, making it a more flexible term.
The trip along the highway was fun
In this context, 'lungo' is a preposition that translates to 'along'. So 'lungo l'autostrada' means 'along the highway'. This sentence shows that 'lungo' can be more than just an adjective; it can also function as a preposition based on the context.