Lean

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Related to lean against: pay heed, conferred, ascertained, leant against

lean

1. (of a mixture of fuel and air) containing insufficient fuel and too much air
2. (of concrete) made with a small amount of cement

Lean

Sir David. 1908--91, English film director. His films include In Which We Serve (1942), Blithe Spirit (1945), Brief Encounter (1946), Great Expectations (1946), Oliver Twist (1948), The Bridge on the River Kwai (1957), Lawrence of Arabia (1962), Dr Zhivago (1965), and A Passage to India (1984)
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

lean

[lēn]
(materials)
Of concrete or mortar, containing little or insufficient cement.
Of clay, deficient in plasticity.
Of coal, having little or no volatile matter.
Of lime, containing impurities.
Of fuel mixture, expecially for internal combustion engines, being low in combustible component.
Of ore, being low-grade.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Lean

An experimental language from the University of Nijmegen and University of East Anglia, based on graph rewriting and useful as an intermediate language. Lean is descended from Dactl0.

Clean is a subset of Lean.

["Towards an Intermediate Language Based on Graph Rewriting", H.P. Barendregt et al in PARLE: Parallel Architectures and Languages Europe, G. Goos ed, LNCS 259, Springer 1987, pp.159-175].
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References in periodicals archive ?
I have problems walking and standing for long periods and felt I had paid to lean against the back railing to only see the second half when the big trucks came in.
Rare and out-of-print books about food lean against spanking-new titles.
Deck posts and railings screwed to a single rim joist feel wobbly because the rim joist flexes whenever you lean against the railing.