noun
A unit of speed equal to one nautical mile per hour, used in maritime and aviation contexts.
船は20ノットの速さで進んでいる。
The ship is moving at a speed of 20 knots.
風速は15ノットに達した。
The wind speed reached 15 knots.
Borrowed from English 'knot'. The ateji spellings 節 and 浬 are phonetic equivalents and are rarely used today.