Definitions:

1. In a manner that provides value, effectiveness, or serves a beneficial function. ADVERB
   • He spent his time usefully by learning a new skill.
2. In a way that achieves something. ADVERB
   • She usefully organized the files to make them easier to find.
3. In a way that is helpful, benficial, or serves a practical purpose. ADVERB
   • The guide usefully explains the steps for befinners.

Synonyms:

• beneficially
• effectively
• practically
• productively