The discipline of allocating a fixed amount of time to a topic or activity, and stopping when the time is up regardless of completeness. In meetings, time-boxing means agendas with per-topic minutes ("15 min: API redesign, 10 min: hiring plan, 5 min: open Q") and a facilitator who actually enforces the boundaries. Time-boxing forces prioritization and prevents the most-vocal topic from absorbing the whole meeting. It also makes meetings feel respectful of participants' time, which is more than aesthetic — it materially affects engagement. The hard part is the enforcement: when a topic runs over, the facilitator must either close it (with an action to follow up async) or explicitly trade time from another topic, not just let the agenda silently slip.