This is the 9664th most frequent Korean word.
계획이었던
"계획이었던" means "that was planned" or "which had been planned."
Here, '계획이었던' describes the planned trip that was originally intended but didn't happen.
원래 계획이었던 바다 여행은 취소되었어요.
The planned trip to the sea was canceled.
In this sentence, '계획이었던' emphasizes an arrangement or plan that has come to fruition.
그녀가 계획이었던 일이 결국 성공적으로 마무리되었어요.
The task she planned was finally completed successfully.
'계획이었던' here refers to goals or objectives that were pre-determined or set beforehand.