To display the AutoCorrect dialog box, press Alt + T + A or click AutoCorrect from the Quick Access Toolbar. Word displays the AutoCorrect dialog box.
Note: If AutoCorrect is not available in your Quick Access Toolbar, read the following article to add AutoCorrect to your Quick Access Toolbar.
On the AutoCorrect dialog box, in the Replace field, type the entry that you want to delete.
Select the entry and then click the Delete button. You are done.