1Altitude, height, or elevation above sea level or the ground — e.g. an airplane's flying height or a mountain's elevation.
飛行機は高度を上げて雲の上に出た。
The plane climbed in altitude and rose above the clouds.
この山の高度は3000メートルを超える。
This mountain's elevation exceeds 3,000 meters.
高山病は高度が上がるにつれて起こりやすくなる。
Altitude sickness becomes more likely as elevation increases.
2Of a very high level or degree; advanced, sophisticated, or highly developed (skills, technology, discussion, etc.).
高度な技術を持つ職人が作った作品だ。
This is a work made by a craftsman with highly advanced skill.
高度な医療を受けられる病院に転院した。
I transferred to a hospital where I could receive advanced medical care.
その議論は高度すぎて理解が難しかった。
That discussion was too advanced and hard to understand.