study

1 study /ˈstʌdi/ noun
plural studies
1 study
/ˈstʌdi/
noun
plural studies
Britannica Dictionary definition of STUDY
1 
: the activity or process of learning about something by reading, memorizing facts, attending school, etc.
[noncount]
[plural]
2 
a  [count] : an area of learning taught in a school : subject — usually plural — see also social studies
b  [singular] : something that a person studies or gives attention to
3 
[count]
a  : an organized experiment in which many things are looked at, measured, recorded, etc., in order to learn more about something
b  : a report or publication based on a study
4 
[count] : a quiet room in someone's home for reading, writing, etc.
5 
[singular] US : a person who learns or memorizes something
6 
[singular] : something or someone that clearly has or shows a particular quality or feature
7 
[count] art : an artistic work that deals with a particular subject and that is done especially to prepare for a larger work
8 
[count] music : a musical composition that is created for the practice of a particular technique

under study

: being thought about and considered so that a decision can be made : being studied
2 study /ˈstʌdi/ verb
studies; studied; studying
2 study
/ˈstʌdi/
verb
studies; studied; studying
Britannica Dictionary definition of STUDY
1 
: to read, memorize facts, attend school, etc., in order to learn about a subject
[no object]
[+ object]
2 
[+ object]
a  : to give careful attention to (something)
b  : to conduct an organized experiment in order to learn more about (something)