Simplified:

On the HSK 4 vocabulary list, at CEFR level B2.

dǐng ㄉㄧㄥˇ

    • apex
    • crown of the head
    • top
    • roof
    • most
    • to carry on the head
    • to push to the top
    • to go against
    • to replace
    • to substitute
    • to be subjected to (an aerial bombing, hailstorm etc)
    • to "bump" a forum thread to raise its profile

      slang

    • classifier for headwear, hats, veils etc

Where 頂 is used

Sources