a means of egress in an emergency - путь эвакуации в случае аварии
narrow means - ограниченные средства
slender means - скудные средства
He is a man of means. - Он — человек состоятельный.
Loosely translated this means... - В вольном переводе это означает...
golden section: the proportion of the two divisions of a straight line or the two dimensions of a plane figure such that the smaller is to the larger as the larger is to the sum of the two. If the sides of a rectangle are in this proportion and a square is constructed internally on the shorter side, the rectangle that remains will also have sides in the same proportion
by fair means or foul: If someone tries to achieve something by fair means or foul, they use every means possible in order to achieve it, and they do not care if their behaviour is dishonest or unfair .
to live beyond your means: If someone is living beyond their means, they are spending more money than they can afford . If someone is living within their means, they are not spending more money than they can afford.
know what it means to do sth/know what sth means: If you know what it means to do something, you know everything that is involved in a particular activity or experience, especially the effect that it has on you.
mean value theorem: the theorem that for a function continuous on a closed interval and differentiable on the corresponding open interval, there is a point in the interval such that the difference in functional values at the endpoints is equal to the derivative evaluated at the particular point and multiplied by the difference in the endpoints