airline

As a noun airline

is a company that flies airplanes to transport people and goods.

As an adjective undefined is

lacking a definition or value.

As a noun airline

is a company that flies airplanes to transport people and goods.

As a proper noun cruise is

.

As nouns the difference between airport and airline

is that airport is an airfield (a place where airplanes can take off and land), including one or more runways and one or more passenger terminals while airline is a company that flies airplanes to transport people and goods.

As nouns the difference between airline and aviation

is that airline is a company that flies airplanes to transport people and goods while aviation is the art or science of making and flying aircraft.

As nouns the difference between airline and airways

is that airline is a company that flies airplanes to transport people and goods while airways is plural of lang=en.

As nouns the difference between airline and aeroplane

is that airline is a company that flies airplanes to transport people and goods while aeroplane is .

As nouns the difference between airline and airlines

is that airline is a company that flies airplanes to transport people and goods while airlines is plural of lang=en.

As nouns the difference between airline and null

is that airline is a company that flies airplanes to transport people and goods while null is a non-existent or empty value or set of values.

As an adjective null is

having no validity, "null and void.

As a verb null is

to nullify; to annul.

As nouns the difference between airline and operator

is that airline is a company that flies airplanes to transport people and goods while operator is one who operates.