ear

1 ear /ˈiɚ/ noun
plural ears
1 ear
/ˈiɚ/
noun
plural ears
Britannica Dictionary definition of EAR
1 
[count] : the part of the body that you hear with
— see picture at face
2 
[singular]
a  : an ability to understand and appreciate something heard
b  — used to describe the way something sounds to you
3 
[count] : attention that is shown or given by listening to what someone says
◊ To lend an ear or, in literary language, to lend someone your ears is to listen to what someone has to say.

all ears

informal
— used to say that someone is listening very closely

a word in someone's ear

— see 1word

bend someone's ear

— see 1bend

box someone's ears

— see 3box

can't believe your ears

— see believe

cock an/your ear

— see 2cock

ears are burning

◊ If your ears are burning or you feel your ears burning, you have the feeling that other people are talking about you.

ears pop

— see 1pop

fall on deaf ears

: to fail to be heard : to be ignored

grin/smile from ear to ear

: to smile widely : to have a big smile on your face

have someone's ear

◊ If you have someone's ear you can talk and give advice to that person because you are trusted.

in one ear and out the other

: through someone's mind without being remembered or noticed

out on your ear

informal
: forced out : thrown out

play by ear

1 
◊ To play a song or a piece of music by ear is to play it after hearing it without looking at written music.
2 
◊ To play it by ear is to do something without special preparation.

set (something) on its ear

informal
: to cause something to be in a state of great excitement or shock

talk someone's ear off

— see 1talk

turn a deaf ear

: to refuse to listen to what someone says

up to your ears

: deeply involved in something

wet behind the ears

— see 1wet

— earless

/ˈiɚləs/ adjective
2 ear /ˈiɚ/ noun
plural ears
2 ear
/ˈiɚ/
noun
plural ears
Britannica Dictionary definition of EAR
[count]
: the part of a corn plant on which the seeds grow