To grow or become clear or transparent; to become free from feculent impurities, as wine or other liquid under clarification.
To grow clear or bright; to clear up.
To make clear or easily understood; to explain in order to remove doubt or obscurity.
To make clear or bright by freeing from feculent matter.
To design and construct the contours of a vehicle etc. so as to offer the least resistance to its flow through a fluid.
To simplify or organize a process in order to increase its efficiency.
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.