runup

Runup, or run-up, is a term used in various domains to denote the period, sequence, or action that precedes a notable event or operation. The exact sense depends on the field, but it generally conveys preparation, escalation, or testing conducted before a main event or outcome. The term can function as a noun or verb phrase, and is often hyphenated as run-up when used adjectivally.

In finance and markets, a run-up refers to a rapid rise in asset prices or trading activity in anticipation of a catalyst such as earnings, a merger, or favorable news. Run-ups can amplify momentum and overwhelm fundamentals, and may be followed by a correction or profit-taking.

In aviation, a run-up is a ground-based engine check performed with the aircraft stationary. During a run-up, engines are brought to higher power while monitoring for abnormal indications, ensuring performance and safety prior to takeoff.

In sports and track and field, the run-up describes the approach used before a jump or throw, such as the sprint-like sequence into a pole vault, high jump, or long jump. The length and mechanics of the run-up are critical to achieving optimal takeoff velocity.

In manufacturing and production planning, a ramp-up or run-up denotes the process of increasing output to meet demand, including scaling labor, equipment, and logistics. This can involve staged production, pilot runs, and quality checks.

In common usage, the phrase can describe the lead-up to political campaigns, events, or releases, such as the run-up to an election or product launch. This broad sense emphasizes preparation and buildup preceding a defined climax or milestone.