There were more men than ladies present; and Andrew, acting as host, had not found time to dance.

About Seville transforming itself to act as host to a world's fair.

It was looking for someone else to act as host.

In some cases a single species may act as both the definitive and intermediate host.

More than 100 species of beetles are known to act as intermediate host.

He would have to act as host and he probably wouldn't get much chance to watch at his mother's window until these people left.

"I choose a guest to act as host at each table, and it's their responsibility to bring out conversation."

The unit also acts as host to a money advice worker.

The university acts as host to all the observatories and, in return, is allowed some observing time at each of them.