The length of time, or span that one can pay attention, or concentrate on one topic without becoming distracted.

The number of items, usually words or numbers, that a person can retain and recall. Memory span is a test of working memory (short-term memory).

The range of parameter values between two successive knots in a spline.

(idiomatic) Alternative form of spick-and-span

brand new; fire-new

(graph theory) A tree structure which includes all vertices of a graph.

(nautical) A large bolt driven through the forecastle deck, with a triangular shackle in the head to receive the heel of the old-fashioned fish davit.

A common roof, having two slopes and one ridge, with eaves on both sides.

An old English children's game, in which one throws a counter on the ground, and another tries to hit it with his counter, or to get his counter so near it that he can span the space between them, and touch both the counters.

(nautical) Any of the blocks at the topmast and topgallant-mast heads, for the studding-sail halyards.