1. Open the dictionary
2. Click on the left box in the row for the entry you want to remove.
3. Click Delete on the toolbar or on the Edit menu. The entry is deleted. If you change your mind, click Undo.
4. When you finish removing words and terms, select File|Save.
You can select multiple entries to delete. To select contiguous entries, click the first one, hold down the Shift key, and click the last one. All entries in between are selected. If the entries are not contiguous, click the first one, hold down the Ctrl key, and click each additional entry you want to select. You can then click Delete Entry to delete the selected entries.