camp out
Synonym discussion
Sense: phrasal verb/1
'Camp out' focuses specifically on sleeping outdoors in a tent or shelter, often in a backyard or during a short trip. 'Go camping' is broader — it covers the whole experience of a camping trip, including hiking, cooking, and sitting by a campfire. 'Sleep out' is more informal and can refer simply to sleeping outside without a tent (e.g., sleeping on a balcony on a hot night). 'Bivouac' is a more technical or military term for a temporary camp without tents. For everyday use, 'camp out' and 'go camping' are the most natural choices: you camp out in your garden for fun, but you go camping in a national park for a long weekend.
Etymology
'Camp' comes from Latin 'campus' meaning 'field', which entered English through French. The verb 'to camp' (stay in a camp) appeared in the 16th century, and 'camp out' emerged later, combining 'camp' with 'out' to emphasise sleeping outside rather than in a fixed shelter.