What does the term "neat" mean when serving a spirit?

The term "neat" refers specifically to serving a spirit straight from the bottle without any ice, water, or mixers. This method showcases the full flavor and characteristics of the spirit, allowing the drinker to appreciate the intricate notes and aromas more fully. For instance, a whiskey served neat allows one to enjoy its complexity and depth without dilution or temperature change caused by ice.

The other options suggest various ways of serving spirits that involve adding ice, mixers, or other modifiers, which detracts from the purity of the drink. When spirits are served on the rocks or mixed with soda, for instance, these practices alter the original taste and experience the distiller intended. Thus, the definition of "neat" stands distinct in that it emphasizes serving the spirit in its purest form.