Webster's Revised Unabridged Dictionary · 1913

Lean

Lean (lēn) , transitive verb

[Icelandic leyna; akin to German laugnen to deny, Anglo-Saxon lȳgnian, also English lie to speak falsely.]

To conceal. [Obsolete] — Ray

Lean (lēn) , intransitive verb

[Old English lenen, Anglo-Saxon hlinian, hleonian, v. i.; akin to Old Saxon hlinōn, Dutch leunen, Old High German hlinēn, linēn, German lehnen, Latin inclinare, Greek kli`nein, Latin clivus hill, slope. r40. Compare Declivity, Climax, Incline, Ladder.]

1.
To incline, deviate, or bend, from a vertical position; to be in a position thus inclining or deviating; as, she leaned out at the window; a leaning column.
He leant forward. — Dickens
2.
To incline in opinion or desire; to conform in conduct; -- with to, toward, etc.
They delight rather to lean to their old customs. — Spenser
3.
To rest or rely, for support, comfort, and the like; -- with on, upon, or against.
He leaned not on his fathers but himself. — Tennyson

Lean , transitive verb

[From Lean, v. i.; Anglo-Saxon hlanan, transitive verb, from hleonian, hlinian, v. i.]

To cause to lean; to incline; to support or rest. — Mrs. Browning
His fainting limbs against an oak he leant. — Dryden

Lean (lēn) , adjective

[Old English lene, Anglo-Saxon hlane; prob. akin to English lean to incline. See Lean, v. i. ]

1.
Wanting flesh; destitute of or deficient in fat; slim; not plump; slender; meager; thin; lank; as, a lean body; a lean cattle.
2.
Wanting fullness, richness, sufficiency, or productiveness; deficient in quality or contents; slender; scant; barren; bare; mean; -- used literally and figuratively; as, the lean harvest; a lean purse; a lean discourse; lean wages.
No lean wardrobe. — Shakespeare
Their lean and flashy songs. — Milton
What the land is, whether it be fat or lean. — Num. xiii. 20
Out of my lean and low ability I'll lend you something. — Shakespeare
3.
(Typography) Of a character which prevents the compositor from earning the usual wages; -- opposed to fat; as, lean copy, matter, or type.

Lean , noun

1.
That part of flesh which consists principally of muscle without the fat.
The fat was so white and the lean was so ruddy. — Goldsmith
2.
(Typography) Unremunerative copy or work.