Futures (in a financial/commodity trading context) — a specialized/technical usage depending on context.
一部のレポートでは延べ取引（futures）について言及している。
Some reports refer to futures transactions.
Credit (buying on credit) — a usage related to credit/credit purchases in specific contexts.
製品を延べで購入する契約になっている場合は条件を確認してください。
If the contract states purchase on credit, please check the terms.
Stretching or extending (the act of stretching/extension).
布を均等に延べてシワを伸ばす。
Stretch the fabric evenly to smooth out the wrinkles.
As a prefix meaning total or aggregate (preceding a counter/unit), e.g. in expressions like 'total number (including duplicates)'.
イベントの参加者は延べ3000人に上った。
The event had a total (cumulative) attendance of 3,000 people.
工事の延べ日数は100日を超える見込みだ。
The total number of construction days is expected to exceed 100 days.
延べ人数と実人数は意味が異なるので注意する。
Be careful: 'total (cumulative) number' and 'actual number of individuals' are different concepts.