Translation:I am travelling with a backpack and a suitcase.
- using something
- used to say what fills, covers, etc something
- used to say that people or things are in a place together or are doing something together
- having or including something
- used to describe the way someone does something
This is a dictionary for learning English, so sometimes one English meaning is few different words in Polish (z, o).
Google says "About 38,000,000 results (0.47 seconds)", there are hundreds of results in British National Corpus and looking at Google NGram shows that it was only 1977, when the use of 'backpack' became more popular than 'rucksack' in English, so this doesn't seem to be entirely true… ;)