GNU Collaborative International Dictionary of English

Found one definition

1.       
   Scan , v. t. [imp. & p. p. Scanned ; p. pr. & vb. n. Scanning.] [L. scandere, scansum, to climb, to scan, akin to Skr. skand to spring, leap: cf. F. scander. Cf. Ascend, Descend, Scale a ladder.]
   To mount by steps; to go through with step by step. [Obs.]
   1913 Webster
   Nor stayed till she the highest stage had scand.
   Spenser.
   
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   1913 Webster
   Specifically (Pros.), to go through with, as a verse, marking and distinguishing the feet of which it is composed; to show, in reading, the metrical structure of; to recite metrically.
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   To go over and examine point by point; to examine with care; to look closely at or into; to scrutinize.
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   The actions of men in high stations are all conspicuous, and liable to be scanned and sifted.
   Atterbury.
   
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   To examine quickly, from point to point, in search of something specific; as, to scan an article for mention of a particular person.
   PJC
   (Electronics) To form an image or an electronic representation of, by passing a beam of light or electrons over, and detecting and recording the reflected or transmitted signal.
   PJC