To improve what was old or outdated. "The company upgraded their personnel"
3.
Give a promotion to or assign to a higher position. Synonyms:advance, elevate, kick upstairs, promote, raise."Women tend not to advance in the major law firms" , "I got promoted after many years of hard work"
... out of Stanley Junction to Afton. Ten miles beyond, however, there was a jolt, a slide and difficult progress on a bit of upgrade rails. ... — Ralph on the Engine - The Young Fireman of the Limited Mail • Allen Chapman
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