1. Making a significant decision or change: This is the most common meaning. It implies a major commitment or action that will have a considerable impact on the person's life.
Examples:
* "Moving across the country was a big step for her, but she knew it was the right choice."
* "Leaving her job to start her own business was a big step, but she's always wanted to be her own boss."
2. Making progress towards a goal: This meaning emphasizes the advancement or progress being made. It suggests that the person is moving forward in a significant way.
Examples:
* "Getting a promotion at work was a big step for him, and he's now in a more challenging and rewarding position."
* "The team took a big step towards winning the championship with their victory last night."
Overall, "taking a big step" signifies a change or action that is important, substantial, and carries weight. It suggests a willingness to move forward and make a difference.