1. completely; entirely
2. considering everything; on the whole
3. in total; combined

Examples

• The plan was altogether different from what we expected.
• I’m not altogether sure about this decision.
• Altogether, the project cost $50,000.
• The weather was altogether too cold for swimming.
• Altogether, there were twenty people at the meeting.
• The experience was altogether wonderful.
• She stopped reading altogether after the accident.