I wouldn't sell it for love or money, for when your father gets his railroad running, I'm going to cash in on ten of the leanest and hardest and lonesomest years that any man ever put in.
He could not afford to lose the leanest and toughest of his little sheep flock--even as price for the happiness of owning a comrade.
The loss of his cash would have meant suspended credit at the store and the leanest three months he had ever known.
I looked for fine work, too, since the leanest wolves are ever foremost in the hunt.
The leanest flesh (muscles) contains fat, but the latter accumulates in certain parts of the body--often to such an extent as to seriously interfere with the functions of life.
XXVI Thou leanest to the shell of night, Dear lady, a divining ear.
While leanest beasts in pastures feed, The fattest ox the first must bleed.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "leanest" in a variety of sentences. We hope that you will now be able to make sentences using this word.