Definitions:

1. In science, refers to a term often used to describe a liquid or gas that has no visible color. ADJECTIVE
   • Oxygen is a colourless and odorless gas.
2. Lacking vibrancy, excitement, or personality. ADJECTIVE
   • His colourless speech failed to campture the audience's attention.
3. Without any color, hue, or tint. ADJECTIVE
   • Water is usually colourless and clear when free of impurities.

Synonyms:

• boring
• colorless
• dreary
• dull
• lifeless
• pale
• palid
• uncoloured
• uninteresting

NearBy Words:

• colourlessness