Although the words ‘appetizer’ and ‘hors d’oeuvre’ are often used interchangeably, there are many differences between the two types of dishes.
Time Eaten: Hors d’oeuvres are typically served before the meal even begins, while appetizers tend to indicate the beginning of the meal. An hors d’oeuvre isn’t considered to be part of the meal, but appetizers are usually chosen specifically to compliment the following courses.
Portion Size: One of the most important distinctions between appetizers and hors d’oeuvres is the portion size. The former tends to be 3-4 bites while the latter are usually 1-2 bites.
Quantity Served: It’s not uncommon to pass around several types of hors d’oeuvres, whereas appetizers are usually served one per person, although there are exceptions.
Purpose and Setting: Hors d’oeuvres can be thought of as ‘mingling food’; small portioned items that are passed around in a social setting. Appetizers on the other hand are often served directly to you while seated at a table.
Method of Eating: Typically, hors d’oeuvres are eaten by hand, whereas you would use cutlery to eat an appetizer. This is a generalization though and there are many exceptions to this rule.