What does ELI5 mean?
A request for a complicated topic to be explained in simple, accessible language.
Also written: Explain Like I'm Five · Explain Like I’m Five · explain like im five · ELI 5 · ELI-5
The meaning
ELI5 stands for “Explain Like I’m Five.” People use it to ask for a clear, beginner-friendly explanation of a difficult idea, usually without jargon or assumed background knowledge.
What’s the tone?
Informal, curious, and usually self-deprecating rather than insulting. It signals that the asker wants clarity, though it can sound dismissive if used to demand that an expert oversimplify important nuance.
When and how to use it
Put ELI5 before a question or use it as a verb-like request, such as “Can you ELI5 how interest rates work?” The goal is an accessible explanation, not necessarily one written literally for a five-year-old.
In a conversation
Original examples to illustrate the expression.
ELI5: Why does raising interest rates sometimes slow inflation?
I understand the headline, but can someone ELI5 what the new rule changes in practice?
Easy to misread
ELI5 asks for simpler language, not a shorter answer at any cost. It differs from TL;DR, which summarizes long material, and from AMA, which invites a broad range of questions.
A little context
ELI5 became strongly associated with online question-and-answer communities built around friendly, simple explanations. Dictionary, editorial, and research sources use the abbreviation consistently for making complex subjects understandable to non-specialists; the entry does not claim a single definitive first use.
Sources & further reading
These sources support the explanation. The dialogue above is original.
- ELI5 | SlangDictionary.com · Checked Oct 24, 2026
Defines ELI5 as Explain Like I’m Five and describes it as a request for a simple explanation of a complicated question, with a public usage example.
- ELI5: Long Form Question AnsweringMeta AI researchers / arXiv · Checked Oct 24, 2026
Documents ELI5 as an online question-answering community where open-ended questions receive explanations intended to be understandable to non-specialists.
- The ultimate internet glossary: from 4chan to ZyngaThe Guardian · Checked Oct 24, 2026
Identifies ELI5 as Explain Like I’m 5 within a broader guide to established online communities and expressions.
Prepared with AI assistance and automated quality checks. Meanings can vary by context. Read our editorial policy.