Retrospective (adjective)

1. Relating to or concerned with the past.
2. Examining or reviewing events that have taken place in the past.
3. Existing or taking place after the fact or event being considered.

Origin:

The word retrospective comes from the late 19th century, derived from the latin word 'retrospectus' meaning a looking back.

Examples:

1. The retrospective analysis of the data revealed that the trends had changed over time.
2. The retrospective exhibit showcased the artist's work from the last 20 years.
3. The retrospective view of the events showed that there were early warning signs that were missed.
4. The retrospective study was an important tool for understanding the evolution of the industry.
5. The retrospective look at the company's history showed that it had gone through several changes over the years.