How to use "meaningless" in a sentence

Without 'Ursula', his life had become meaningless, work disgusted him, walking tired him, solitude bored him.

Scraps of music, split-second flashes of disc jockeys' chatter, single words from different somber-voiced newscasters, and fragments of commercial jingles blended in a cacophonous jumble of meaningless sound

Abruptly her hand swung across the map, then back, then described a series of circles; the pen made meaningless scrawls on the paper

Elliot had suggested a change in the color of ink, so they would be able to tell the difference between the meaningless scribbles that were already on the map and any new marks that might be made.