ARAM - What does ARAM mean in LoL?

ARAM stands for "All random all mid." See an example of how people use it.
League of Legends (LoL) players use ARAM to refer to the All Random All Mid game mode. In this mode, players are assigned random champions (from their pool of owned champions) and forced to fight in a single lane.

League of Legends players say ARAM is dying because of new changes

Found a neat ARAM stats website (aramstats.lol) - you can even see

ARAM 2023: Preview - League of Legends

The Strategic Dynamics of Hora Clash in League of Legends' ARAM Mode

dev: ARAM Changes Wrap-Up – League of Legends

Highest Win Rate Champions on ARAM on Patch 13.9 : r/ARAM

League of Legends - ARAM Game Mode - Full Game

Simple League of Legends ARAM Guide

Aram is not playable at all - General Discussion - Heroes of the

Forget Loldle, there's a new League of Legends quiz in town

dev: ARAM Changes Incoming – League of Legends

What is ARAM in League of Legends? - Eloking

dev: More Experimental ARAM Changes – League of Legends

ARAM items tier list discussion : r/ARAM

dev: All Random All Mid