Dictionary.com defines redundancy as follows–

1. The state of being redundant.
2. Superfluous repetition or overlapping, esp. of words.
3. A redundant thing, part, or amount; superfluity.
4. The provision of additional or duplicate systems, equipment, etc., that function in case an operating part or system fails, as in a spacecraft.

So–Unless you happen to be building a spaceship, avoid redundancy. In business, redundant phrases creep in with the greatest of ease.

Acronyms are redundancy accidents waiting to happen.

1. ATM machine.
2. PIN number.
3. VIN number.
4. MBE company.

The dread adjective often functions as an innocent–yet irrelevant–piece of verbiage.

1. Absolutely sure.
2. Downward plunge.
3. End result.
4. Free gift.
5. Major breakthrough.
6. Specific details.

These examples come from a Wikipedia list of redundancies–studying it will improve your writing.

Thoughtful editing is the best way to excise extraneous expression. Consider every word. Ask yourself, “Does it add meaning to my idea, or am I just filling space?”

Word Sell … Scrambled Toast