What is the meaning of Glissando?

Either a continuous sliding from one pitch to another ("true" glissando), or an incidental scale played while moving from one melodic note to another ("effective" glissando).

A method of playing an electric guitar in which a metal bar is held at right angles across the strings and rapidly moved up and down, creating a smooth, lush sound.

To play with a glissando or sliding effect.

glissando

glissando (a continuous sliding from one pitch to another)

gerund of glissare

in the style of a glissando

glissando

Source: wiktionary.org