Real Dictionary

salad
variable noun: A salad is a mixture of raw or cold foods such as lettuce, cucumber, and tomatoes. It is often served with other food as part of a meal.

salad in American English
a dish, usually cold, of raw or sometimes cooked vegetables or fruits in various combinations, served with a dressing, or molded in gelatin, and sometimes with seafood, poultry, eggs, etc. added
noun: a usually cold dish consisting of vegetables, as lettuce, tomatoes, and cucumbers, covered with a dressing and sometimes containing seafood, meat, or eggs

salad in British English
noun: a dish of raw vegetables, such as lettuce, tomatoes, etc, served as a separate course with cold meat, eggs, etc, or as part of a main course