To unravel; to separate into discrete components or units.
To become free or untangled.
To free something from entanglement; to extricate or unknot.
To simplify or organize a process in order to increase its efficiency.
To design and construct the contours of a vehicle etc. so as to offer the least resistance to its flow through a fluid.
To modernise.
On a weather chart, a line that is tangent to the flow of the wind.
A line that is tangent to the velocity of flow of a fluid; equivalent to the path of a specific particle in that flow.