Science / Weather / Instrument Flight Rules (IFR): Refers to the general weather conditions pilots can expect at the surface and applies to the weather situations at an airport during which a pilot must use instruments to assist take off and landing. IFR conditions for fixed wing aircraft means the minimum cloud ceiling is greater than 500 feet and less than 1,000 feet and/or visibility is greater than 1 mile and less than 3 miles.
Instrument Noun Synonyms: agency, means, way, factor, mechanism, instrumentality, wherewithal, (prime) mover, catalyst, agent
Instrument Adjective Synonyms: implement, tool, device, apparatus, utensil, appliance, contrivance, mechanism, gadget, contraption, thingumabob, thingumajig, thingummy, thingy, whatsit, what's-its-name, whatnot, what-d'you-call-it, gubbins, gismo or gizmo
Business / Finance / Instruments: Notes issued by a federal agency whose obligations are guaranteed by the full-faith-and-credit of the government, even though the agency's responsibilities are not necessarily those of the U.S. govern MORE
Entertainment / Music / Instrumentation: Arrangement of music for a combined number of instruments. MORE