tune

1 tune /ˈtuːn/ Brit /ˈtjuːn/ noun
plural tunes
1 tune
/ˈtuːn/ Brit /ˈtjuːn/
noun
plural tunes
Britannica Dictionary definition of TUNE
[count]
: a series of musical notes that produce a pleasing sound when played or sung

call the tune

informal
: to be in charge or control of something

change your tune

informal or sing a different tune
: to change the way you talk about something : to have a different opinion about something

dance to someone's tune

— see 1dance

in tune

1 
: in a state in which the correct musical sound is played or sung
2 
a  : in a state in which people agree with or understand one another
— usually + with
b  : in a state in which one thing agrees with or matches another — usually + with

out of tune

1 
: in a state in which the correct musical sound is not played or sung
2 
a  : in a state in which people do not agree with or understand one another — usually + with
b  : in a state in which one thing does not agree with or match another — usually + with

to the tune of

1 
: using the tune of (a particular song)
2 
informal — used to emphasize a large amount of money
2 tune /ˈtuːn/ Brit /ˈtjuːn/ verb
tunes; tuned; tuning
2 tune
/ˈtuːn/ Brit /ˈtjuːn/
verb
tunes; tuned; tuning
Britannica Dictionary definition of TUNE
1 
[+ object] : to adjust (a musical instrument) so that it makes the correct sound when played
2 
[+ object] : to make small changes to (something) in order to make it work better
— often + up — see also fine-tune, tune-up
3 
: to adjust (a radio or television) so that it receives a broadcast clearly
[+ object]
— often used as (be) tuned
[no object]
— + to

stay tuned

: to keep watching a television show or listening to a radio broadcast
— often used figuratively

tune in

[phrasal verb]
1 
: to watch a television show or listen to a radio broadcast
2 
be tuned in : to understand and be aware of a situation, other people's needs, etc. — usually + to

tune out

[phrasal verb] informal
1 
: to stop paying attention to what other people are saying or doing : to become unaware of what is happening around you
2 
tune (someone or something) out or tune out (someone or something) : to ignore or not listen to (someone or something)