For the vocabulary we are studying for our dictées students are studying the definitions of the words so that on the dictée they can provide a definition of each word they spell. This is to ensure that they not only know how to spell the words but also know their meaning and how to use them. There is not much point learning the words if they don't know what they mean. If you would like to help your child study the definitions or if they have not finished finding the definitions during the time they are given to do so in class an excellent resource is the online version of the Larousse dictionary, This can be accessed at:
One of the great features of this dictionary is that when you search a definition for a verb in the dictionary it gives you the option of clicking a red button that says 'conjugaison' and it will provide you with the conjugations of that verb. It also provides a sentence for each definition which gives an example of how the word could be used. This dictionary is one of the most reputable French dictionaries in print and their online version is also excellent.