A female colleague kicked you under the table in a meeting, which may have many meanings, depending on the situation and relationship. Here are some possible meanings:

1. Attract attention: She may want to attract your attention and let you know that she exists, or she has something to say to you.

2. Agree: She may agree with your opinion or idea and express her approval by kicking her feet.

3. Boring behavior: She may feel bored and kick your feet just to pass the time or get your attention.

4. Flirting: If you have a good relationship, it may be a flirting or joking way for her to kick you.

5. Demonstrating or protesting: If you have conflicts at work or in other aspects, her kicking you may be a way of demonstrating or protesting, indicating that she doesn't agree with some of your behaviors or opinions.

In a word, you need to understand the exact meaning of this behavior in combination with the actual situation and the relationship between you. If you are confused or uncertain, you'd better communicate with her directly at the right time to find out her real intention.