The meaning of SOUR is being, inducing, or marked by the one of the five basic taste sensations that is produced chiefly by acids and is characteristic of lemon juice.

SOUR meaning: 1 : having an acid taste that is like the taste of a lemon tart; 2 : having the unpleasant taste or smell of food that is no longer fresh

SOUR definition: 1. having a sharp, sometimes unpleasant, taste or smell, like a lemon, and not sweet: 2…. Learn more.

1. To make or become sour. 2. To make or become disagreeable, disillusioned, or disenchanted.

Definition of sour adjective from the Oxford Advanced Learner's Dictionary. having a taste like that of a lemon or of fruit that is not ready to eat.

Sourness, also known as sour, is a basic taste sensation perceived through hydrogen ions from acidic compounds interacting with taste bud receptors, and it can also refer to an unpleasant or acidic …

to make bitter, disillusioned, or disagreeable: One misadventure needn't have soured him. That swindle soured a great many potential investors.

Sour definition: Having a taste characteristic of that produced by acids; sharp, tart, or tangy.

SOUR definition: having an acid taste, resembling that of vinegar, lemon juice, etc.; tart. See examples of sour used in a sentence.

Something that is sour has a sharp, unpleasant taste like the taste of a lemon. The stewed apple was sour even with honey.