n.
Function: noun
Date: 1584
1 : a calm stretch of shallow water flowing smoothly
2 : the act or action of gliding
3 : PORTAMENTO
4 a : a less prominent vowel sound produced by the passing of the vocal organs to or from the articulatory position of a speech sound ― compare DIPHTHONG b : SEMIVOWEL
5 : a device for facilitating movement of something especially : a circular usually metal button attached to the bottom of furniture legs to provide a smooth surface