1. very great in amount, effect, or force; overpowering
2. difficult to deal with because of size, complexity, or intensity

Examples

• The response to our fundraiser was overwhelming.
• She felt overwhelming sadness after hearing the news.
• The amount of homework was overwhelming for the new student.
• The team won by an overwhelming margin.
• The smell of flowers in the garden was overwhelming.
• He received overwhelming support from his colleagues.
• The task seemed overwhelming at first, but she broke it into smaller steps.