This is the 8752nd most frequent Japanese word.
有意義
Meaningful; significant.
In this sentence, "有意義" is used to express that the experience had significance and value in the context of the speaker's life.
この経験は私の人生にとって本当に有意義でした。
This experience was truly meaningful in my life.
Here, "有意義" describes the discussion as being purposeful and productive, contributing to finding a solution.
有意義な議論が行われ、解決策が見つかった。
A meaningful discussion was held, and a solution was found.
In this instance, "有意義" refers to the time spent on the trip as valuable and enriching for the speaker.