1. speaking loudly and dramatically, especially in a formal or theatrical manner
Usage: present participle of declaim
2. speaking passionately against something; denouncing
Usage: often followed by ‘against’

Examples

• The actor was declaiming his lines with great emotion.
• She stood on the stage, declaiming poetry to the audience.
• The politician was declaiming against corruption in government.
• He spent the evening declaiming about the injustices of the system.
• The student was declaiming Shakespeare’s sonnets in drama class.
• The speaker was declaiming passionately about environmental protection.