The Dictionary.com HD app brings a trusted (ad-free) dictionary and thesaurus, containing nearly 2 million words, definitions, synonyms, and antonymns, to the iPad. This invaluable reference resource is available offline, with some additional features, such as voice-to-text search and audio pronunciation, available with a Wi-Fi connection.

This paid version of the app is ad-free, and is highly recommended for educational use. There are separate versions for iTouch and iPhone.

For: Administrators. Teachers, Students, Students with Special Needs

Cost: $4.99 (Download Link).

Requires WiFi: Only for additional features.

• Support students in literacy activities, particularly for finding the spelling and meaning of words
• Learn the pronunciation of words – valuable for special needs students