having an acid taste like lemon or vinegar

she sampled the wine and found it was sour

feeling or expressing resentment, disappointment, or anger

he gave her a sour look

the meeting ended on a sour note

(of soil) deficient in lime and usually dank

(of petroleum or natural gas) containing a relatively high proportion of sulphur

a drink made by mixing a spirit with lemon or lime juice

a rum sour

make or become sour

water soured with tamarind