There was an emergency lighting system in the control car of small orange bulbs over the essential instruments, and this kept going.

That would threaten the essential instrument of Communist governance: police terrorism.

It is an essential instrument played in festivities and ritual ceremonies.

It's also the victims/perpetrators' essential instrument of personal survival in an uncertain new order.

Measuring and monitoring instruments, essential to quality control, were in short supply.

The proposed college is an innovative instrument essential to the pursuit of these objectives.

This programme is an essential instrument for exchange and cooperation in the field of higher education.

They also form an essential instrument for clarifying the European perspective.

The law against gender violence is a necessary and essential instrument.

The state can thus be deemed a significant but not essential instrument of the Holy See.