stress

1 stress /ˈstrɛs/ noun
plural stresses
1 stress
/ˈstrɛs/
noun
plural stresses
Britannica Dictionary definition of STRESS
1 
a  [noncount] : a state of mental tension and worry caused by problems in your life, work, etc.
b  : something that causes strong feelings of worry or anxiety
[noncount]
[count]
2 
: physical force or pressure
[noncount]
[count]
3 
[noncount] : special importance or attention that is given to something
4 
: greater loudness or force given to a syllable of a word in speech or to a beat in music
[noncount]
[count]
2 stress /ˈstrɛs/ verb
stresses; stressed; stressing
2 stress
/ˈstrɛs/
verb
stresses; stressed; stressing
Britannica Dictionary definition of STRESS
1 
[+ object] : to give special attention to (something)
2 
[+ object] : to pronounce (a syllable or word) in a louder or more forceful way than other syllables or words
3 
US, informal : to feel very worried or anxious about something : to feel stress
[no object]
[+ object]

stress out

[phrasal verb]
stress out or stress (someone) out or stress out (someone) informal
: to feel very worried or anxious or to make (someone) feel very worried or anxious