The remaining necessary $188,000 was added all at once by a single anonymous donor.

This makes the firm the largest single donor to the senator's campaign.

So it wasn't even a single donor I had to choose but a collection, a triumvirate.

The group recently created a political arm that has raised $1 million from a single anonymous donor.

No single donor, or family, would think it proper to assert itself by name.

Usually a school changes its name after receiving a large donation from a single donor or a small group.

A single donor has offered a matching grant of $500,000 toward the $3 million goal.

There was a single donor, whose own infection had occurred too recently to be detected.

The number of children permitted to be born from a single donor varies according to law and practice.

Designs based on a single donor simplify the build process.