interline(4) (iou) and air 1, noun (oh)

interline(4) (iou)

interline verb3. L20.
[from INTER- 2 + LINE noun2.]
verb intrans.
a. Use transport by more than one route, service, etc. L20.
b. Provide interconnections with another service. L20.
verb trans. Provide interconnecting transport for. L20.

air 1, noun (oh)

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1 ?gas?
2 ?space above the ground?
3 ?planes?
4 be in the air
5 ?appearance?
6 be up in the air
7 be on/off (the) air
8 ?Music?
9 airs
10 be walking/floating on air
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[Sense: 1-7, 9; Date: 1200-1300; Language: Old French; Origin: Latin aer, from Greek]
[Sense: 8; Date: 1500-1600; Origin: Probably a translation of Italian aria; ARIA]
?GAS?
[U] the mixture of gases around the Earth, that we breathe
::You need to put some air in the tyres.
in the air
::There was a strong smell of burning in the air.
::Let's go outside and get some fresh air.
::public opposition to air pollution
-see also a breath of fresh air at breath (2)
?SPACE ABOVE THE GROUND?
the air
the space above the ground or around things
into the air
::Flames leapt into the air.
through the air
::He fell 2000 metres through the air without a parachute.
?PLANES?
a) by air
travelling by, or using a plane
::I'd prefer to Travel by air.
b) relating to or involving planes
::the victims of Britain's worst air disaster
:: Air Travel was growing rapidly.
:: air traffic congestion
::His brother died in an air crash .
be in the air
a) if a feeling is in the air, a lot of people feel it at the same time
::There was a sense of excitement in the air.
b) to be going to happen very soon
::Change is in the air.
?APPEARANCE?
[singular] if something or someone has an air of confidence, mystery etc, they seem confident, mysterious etc
air of
::She had an air of quiet confidence.
::She looked at him with a determined air.
be up in the air
if something is up in the air, no decision has been made about it yet
::Our trip is still very much up in the air.
be on/off (the) air
to be broadcasting on the Radio or Television at the present moment, or to stop broadcasting
::We'll be on air in three minutes.
?Music?
[C] a simple tune, often used in the title of a piece of classical Music
airs [plural] a way of behaving that shows someone thinks they are more important than they really are
put on airs/give yourself airs
::Trudy is always putting on airs.
::an actor with no airs and graces
be walking/floating on air
to feel very happy
-see also hot air , on-air , clear the air at clear 2 (15), disappear/vanish into thin air at thin 1 (15), out of thin air at thin 1 (16)

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