Abbreviation of "presentation." A talk or slide-based explanation given at work, school, etc.; often used with the verb 'to present' (プレゼンする).
明日の会議で新製品のプレゼンをする予定だ。
I plan to give a presentation about the new product at tomorrow's meeting.
プレゼンの資料は図やグラフを多く入れて、分かりやすく作った。
I made the presentation materials easy to understand by including many charts and graphs.
彼女のプレゼンは短くて要点がまとまっている。
Her presentation was short and to the point.
来週はクライアントの前でプレゼンするので準備をしっかりしよう。
We have to prepare carefully because we will present in front of the client next week.