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GRE TOEFL 考研

解释

GRE 红宝书

• v. 提升, 给...升级
• ［英］ v. 提升, 给...升级 ( give a position of more importance to)
• ［记］ up（向上）+grade（等级） -> 升级

Webster Collegiate

I. noun

• Date: 1873
• 1. an upward grade or slope
• 2. increase, rise
• 3. improvement 2b

II. verb

• Date: 1901
• transitive verb
  • to raise or improve the grade of: as
    • a. to improve (livestock) by use of purebred sires
    • b. to advance to a job requiring a higher level of skill especially as part of a training program
    • c. to raise the quality of
    • d. to raise the classification and usually the price of without improving the quality
    • e. to extend the usefulness of (as a device)
    • f. to assign a less serious status to <upgraded the patient's condition to good>
• intransitive verb
  • to improve or replace especially software or a device for increased usefulness
• ? upgradability or upgradeability noun
• ? upgradable or upgradeable adjective

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