1. expressing disagreement with or objection to something
Usage: present participle of ‘protest’
2. participating in a public demonstration against something
Usage: present participle of ‘protest’

1. expressing strong disagreement or objection

Examples

• The students are protesting the new dress code policy.
• She kept protesting her innocence despite the evidence.
• Hundreds of workers were protesting outside the factory gates.
• His protesting voice could be heard from across the room.
• The citizens are protesting against the proposed tax increase.
• The child was protesting loudly about having to go to bed early.
• Environmental groups are protesting the construction of the new pipeline.