F1 glossary

Active aerodynamics

Front and rear wings that move on their own between a low-drag position (straights) and a high-downforce one (corners). One of the 2026 novelties.

Blue flag

A faster car is coming up behind: you must let it through.

Compound

The type of tyre (soft, medium, hard…): softs grip more but wear out sooner.

Cost cap

A ceiling on the money a team can spend per year on most of what it costs to build and run the car. Drivers' salaries, for example, are left out.

Diffuser

A rear part of the floor that widens and slows the air leaving from underneath the car. In 2026 it is much bigger.

Drive-through

A penalty in which the driver must go through the pit lane at the speed limit, without stopping, and rejoin the track.

DRS

Drag reduction system: a movable rear wing that opened on straights so the chasing car was faster. Until 2025; in 2026 active aerodynamics and overtake mode replace it.

Ground effect

A suction that sticks the car to the tarmac: air passing very fast through the floor tunnels lowers the pressure and pushes the car down. Used from 2022 to 2025.

Halo

A protection bar over the driver's head, with three mounting points, that deflects large objects away from the cockpit. Compulsory since 2018.

Lapped car

A driver whom a leader has put a full lap down. They must let the fastest car through when shown the blue flag.

MGU-H

A motor-generator that recovered energy from the heat of the turbo's exhaust gases. It disappears from the 2026 power units.

MGU-K

An electric motor-generator linked to the crankshaft: it recovers energy under braking and returns it as extra power. In 2026 it goes from 120 to 350 kW.

Overcut

The opposite of the undercut: staying out longer than your rival, in clean air, and coming out ahead when they pit.

Overtake mode

Extra electrical energy the chasing car can use when within one second of the car ahead at the detection point. It replaces DRS in 2026.

Parc fermé

A regime in which, from the moment the car goes out to qualify, teams can only make minimal, supervised changes. It aims to make sure the car that qualifies is the one that races.

Pit lane

The pit road, parallel to the start/finish straight, with a speed limit. "Pit-lane time" is what a car spends from entering to leaving.

Pit stop

A stop in the pits to change tyres (and sometimes repair something). The four-wheel change takes about 2 seconds; what costs far more is entering and leaving the pit lane.

Pit-stop cost

The time lost by entering the pits, stopping and rejoining compared with staying out. It changes from one circuit to another; on the site it is measured with each race's data.

Pole

First place on the grid: the fastest driver in qualifying starts first.

Q1, Q2 and Q3

The three rounds of qualifying. In 2026, with 22 cars, Q1 eliminates the 6 slowest, Q2 another 6 and the remaining 10 fight for pole in Q3.

Red flag

The session is stopped; cars return to the pits.

Regenerative braking

Braking with the electric motor, which turns braking energy into electricity for the battery, instead of losing it as heat in the discs.

Safety car

A car that comes out on track after an incident so the cars lap slowly and bunched while the track is cleared.

Sprint

A short race of about 100 km (around 30 minutes) held at some weekends, with no compulsory pit stop and points for the top eight.

Starting grid

The race starting order, which comes from qualifying: the fastest starts first.

Stint

The part of a race a driver runs on the same set of tyres, between two pit stops.

Stop-and-go

A penalty in which the driver must stop 10 seconds in their box, with the mechanics unable to touch the car, before rejoining the track.

Super licence points

Penalty points the FIA can give a driver. They last 12 months and collecting 12 in that period means a one-race ban.

Track limits

The white lines that mark the edge of the track. Putting all four wheels outside them can cost a warning, or a penalty if repeated or if an advantage is gained.

Undercut

Pitting before the car ahead so that, on fresh tyres, you lap faster and come out ahead when they stop.

Virtual safety car (VSC)

A neutralisation in which all cars must stay below a set time, without the safety car coming out on track.

Wheelbase

The distance between the front and rear axles: the length of the car between the wheels. In 2026 it is 200 mm shorter.

Yellow flag

Danger on track: slow down and do not overtake in that zone.

Popular-level definitions. For the exact rules, check the FIA sporting regulations.