A family outing was a trip that an individual would go on for pleasure or education, usually with a group of people and lasting no more than one day.
In 2375, while having a discussion, Rom believed since he and Nog had not seen much of each other lately, he thought it might be a good way of spending some time together, and Leeta said, "And I decided to make it a complete family outing." (DS9: "Take Me Out to the Holosuite")