Highest

Very elevated; extending or being far above a base; tall; lofty.

"The balloon rose high in the sky.   The wall was high.   a high mountain"

Relatively elevated; rising or raised above the average or normal level from which elevation is measured.

Having a specified elevation or height; tall.

"three feet high   three Mount Everests high"

Elevated in status, esteem, prestige; exalted in rank, station, or character.

"The oldest of the elves' royal family still conversed in High Elvish."

In or to an elevated position.

"How high above land did you fly?"

In or at a great value.

"Costs have grown higher this year again."

At a pitch of great frequency.

"I certainly can't sing that high."