"Least" refers to the smallest amount, quantity, or degree of something. It is used to indicate the lowest position or level among multiple options or choices. Full definition
I don't know a single person that has never been one or all of those things to some degree or another at least at times. (nakedpastor.com)
The company has priced 50 million shares at $ 10 each, and plans to use the proceeds of the offering to acquire a tech company valued at at least $ 1 billion. (fortune.com)
It definitely has its flaws yet the overall experience is one that any RPG fan should take part in at least once in their life. (videochums.com)