# jointly

/ˈdʒɔɪntɫi/ (US) · /dʒˈɔɪntli/ (UK) · CEFR B2 · Adverb

Source: https://englishreference.com/word/jointly
Updated: 2026-05-02

## Definition

together with one or more other people. You use this when two or more people share the work or the cost of something.

For teachers: in a shared manner or in collaboration with others. Often used in legal or formal contexts to describe shared ownership or responsibility.

## Examples

- The two companies jointly developed the new software.
- The property is owned jointly by the three siblings, meaning they must all agree before it can be sold.
- The research paper was published jointly by scientists from several international universities, reflecting a decade of cross-border cooperation in the field of renewable energy.

## Pitfalls

- Not "They jointly to the project" but "They contributed jointly to the project" — Jointly is an adverb and cannot function as a verb; it must modify an action.

## Usage notes

- Typically placed before the verb it modifies or at the end of the clause.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.