A spirit level is an instrument used to determine whether a surface is exactly horizontal or vertical.
Spirit level can also refer to: Engineer's spirit level, a specialised instrument used to level machinery Spirit Level, Australian record label The Spirit Level (poetry collection), a 1996 poetry collection by Seamus Heaney The Spirit Level (Wilkinson and Pickett book), a 2009 book by Richard G. Wilkinson and Kate Pickett Spirit levelling, a surveying technique