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Original · left

Tailgating (party or driving)

Following another car too closely, or a party held in a stadium parking lot.

First in use: the 1900s
Duplicate · right

Tailgating (physical security)

Following an authorized person through a secured door without credentials.

First in use: the 1990s

Tailgating / Tailgating (party or driving) / Tailgating (physical security)

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Parking-lot parties vs. following someone through a door.

Which meaning of Tailgating is the original, and which one is the duplicate riding on its name? Tailgating (party or driving) came first (the 1900s). Tailgating (physical security) arrived in the 1990s. The data below shows which one owns the word now.

Wikipedia pageviews since 2015

Tailgating (party or driving)Tailgating (physical security)
English Wikipedia pageviews since July 2015 load here.

Duplicate's share of attention

Green line = duplicate's % · above 60 it owns the word · below 40 the original does

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The case for each meaning

Sourced definitions, usage stats and quotes

Original · the 1900s

Tailgating (party or driving)

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Duplicate · the 1990s

Tailgating (physical security)

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More duplicated terms

Cybersecurity