Język jako system znaków

We have to deal with numerous signs in everyday life, given us both by the nature – as, for example, clouds being a sign of upcoming rain, and also traditional, conventional signs and created by ourselves for better communication. A sign is a perceptible arrangement of things or a phenomenon caused by someone else for the reason that some set expression or formed customary rules govern combining a definite type of thoughts with this arrangement of things or the phenomenon.