sigh sigh /ˈsaɪ/

noun

1. () An utterance made by exhaling audibly  ( suspiration , sigh )
   an utterance made by exhaling audibly
    I let out a sigh of relief when I finally submitted my project on time
   I let out a sigh of relief when I finally submitted my project on time
   
   
2. A sound like a person sighing  ( sigh )
   a sound like a person sighing
    She heard the sigh of the wind in the trees
   she heard the sigh of the wind in the trees
   

verb

1. () Heave or utter a sigh; breathe deeply and heavily  ( suspire , sigh )
   heave or utter a sigh; breathe deeply and heavily
    She sighed sadly
   She sighed sadly
   
2. () Utter with a sigh  ( sigh )
   utter with a sigh