toothbrush /ˈtuːθ.bɹʌʃ/noun 1verb 1forms 4 noun1 •A brush, used with toothpaste, for cleaning the teeth. verb1 •To clean or scrub with a toothbrush.In Rome, a restorer toothbrushed away some candle-grime over God's Sistine Chapel eye to reveal an eyebrow of Groucho Marx proportion. — 1997 formstoothbrushed · toothbrushing · toothbrushes · teethbrush