noun
twice; two times
Counts occurrences or repetitions; often used with verbs to indicate doing something twice.
彼には二度と会いたくない。
I never want to see him again.
この映画は二度見た。
I've seen this movie twice.
noun
two degrees
Used for temperature, angles, or other degree-based measurements.
気温が二度上がった。
The temperature rose by two degrees.
一度 means 'once' or 'one time', while 二度 means 'twice' or 'two times'.
二回 also means 'twice', but is more common in counting discrete events or rounds; 二度 can sound slightly more formal or emphatic.
Compound of 二 (two) and 度 (time, occurrence, degree).