For units in astronomy, see astronomical system of units. The astronomical unit (symbol au, AU or ua) is a unit of length, roughly the distance from the Earth to the Sun. However, that distance varies as the Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year.
senza. prep. 1. (Classical Music) music without; omitting. [Italian]. 1  Facebook.enza. prep. 1. (Classical Music) music without; omitting. [Italian]. 1  Facebook.
In informal use, senpai (also styled as sempai) can refer to anyone whose attention you want to getâthat could be someone you admire and want to be friends with or someone you're interested in romantically. Senpai made its first appearance in Urban Dictionary back in 2004, when a user defined it as an upperclassman..