a line or point that may not or cannot be passed; greatest or smallest amount, extent etc of what is possible
greatest extent
Cases of word usage
1) extreme point, end or limit (extremity)
2) a part of a country bordering on another country; an extreme limit (frontier)
3) the line at which the earth or sea seems to meet the sky; the limit of one's knowledge, experience, thinking etc (horizon)
4) not clear; vague; having no precise limit (indefinite)
5) a fixed quantity or share, especially of food, allowed to one person or group; to limit (food, water etc) (ration)