streamline

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To construct or design in a form that offers the least resistance to fluid flow.
2. v. To improve the appearance or efficiency of; modernize.
3. v. To organize.
4. v. To simplify.
5. n. A line that is parallel to the direction of flow of a fluid at a given instant.
6. n. The path of one particle in a flowing fluid.
7. n. A contour of a body constructed so as to offer minimum resistance to a fluid flow.

Century Dictionary and Cyclopedia

1. n. See line, and line of flow (under flow).

Wiktionary

1. n. physics A line that is tangent to the velocity of flow of a fluid; equivalent to the path of a specific particle in that flow.
2. n. meteorology On a weather chart, a line that is tangent to the flow of the wind.
3. v. transitive To design and construct the contours of a vehicle etc. so as to offer the least resistance to its flow through a fluid.
4. v. transitive, by extension To simplify or organize a process in order to increase its efficiency.
5. v. transitive To modernise.

GNU Webster's 1913

1. The path of a constituent particle of a flowing fluid undisturbed by eddies or the like.
2. adj. Of or pert. to a stream line; designating a motion or flow that is free from turbulence, like that of a particle in a streamline; hence, designating a surface, body, etc., that is designed so as to afford an unbroken flow of a fluid about it, esp. when the resistance to flow is the least possible; ; -- the current usuage prefers the term streamlined.
3. v. to design or modify so as to present the least possible resistance to fluid flow; -- used mostly of vehicles, such as automobiles, airplanes, or ships.
4. v. to change so as to make more efficient; -- used especially of organizations, procedures, or methods.

WordNet 3.0

1. v. contour economically or efficiently