1. lacking flavor or taste; bland
Usage: British spelling; American spelling is 'flavorless'
2. lacking interest, excitement, or character; dull
Usage: figurative use

Examples

• The soup was flavourless because it had no salt or spices.
• The boiled vegetables tasted flavourless and mushy.
• His speech was flavourless and failed to capture the audience's attention.
• The airline meal was dry and flavourless.
• Without garlic and herbs, the dish became flavourless.
• The presentation was technically correct but flavourless and uninspired.