Definition of "alongside"

The Italian opted for Bolton's Cahill alongside captain John Terry - and his decision was rewarded with a goal after only 13 minutes. Bulgaria gave a hint of defensive frailties to come when they failed to clear Young's corner, and when Gareth Barry found Cahill in the box he applied the finish past Nikolay Mihaylov.

2011 September 2, Phil McNulty, “Bulgaria 0-3 England”, in BBC

A “moving platform” scheme […] is more technologically ambitious than maglev trains even though it relies on conventional rails. Local trains would use side-by-side rails to roll alongside intercity trains and allow passengers to switch trains by stepping through docking bays.

2013 June 1, “Ideas coming down the track”, in The Economist, volume 407, number 8838, page 13 (Technology Quarterly)

Gatwick, on the other hand, is alongside the Brighton main line, with rail services both to the north (City and West End) and south.

2019 October, John Glover, “Heathrow rail expansion”, in Modern Railways, page 71