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the lights are on but nobody's home

the lights are on but nobody's home

9.9
Looking awake but not paying attention or thinking clearly
  • idiom
  • Offensive
translation icon : estar despistado
  • When he gave that blank look during the meeting, I thought the lights are on but nobody's home.

Examples

  • I think the lights are on but nobody's home!

  • When he stared at the wall, I thought, the lights are on but nobody's home.

  • After I asked the question, it seemed the lights are on but nobody's home.

  • She was staring at the board, but the lights are on but nobody's home.

  • When she stared blankly at her computer screen, it was clear the lights are on but nobody's home.

  • During the lecture, many students looked attentive, but the lights are on but nobody's home for some of them.

  • I tried to get his attention, but his expression said the lights are on but nobody's home.

Synonyms

absent
vsthe lights are on but nobody's home
19 4.0

Not paying attention because your mind is somewhere else

appears present yet is not mentally engaged or responsive
unresponsive
vsthe lights are on but nobody's home
10 4.9

Not answering or showing interest when someone asks

is often inwardly distracted despite seeming outwardly awake
like a zombie
vsthe lights are on but nobody's home
  • Informal
6 8.4

Moving slowly and not fully aware because you are very tired

is a milder mental disengagement without strong dazed appearance
nonresponsive
vsthe lights are on but nobody's home
3 6.2

Not reacting to a question or an action

applies in informal speech to describe someone present but mentally checked out
asleep at the switch
vsthe lights are on but nobody's home
  • Informal
3 8.7

When you should be paying attention, you miss important things

is more about mental disengagement without implying negligence or missed duties
absentminded
vsthe lights are on but nobody's home
2 5.9

A person who often does not pay attention and forgets small things like keys

is a situational lack of engagement despite seeming alert

Antonyms

82 2.8

Quick to notice and respond to what is happening

3.4

Giving full attention to an activity or idea

How Alert

attentive
61 3.0
the lights are on but nobody's home
  • Offensive
9.9
absentminded
2 5.9

Surface Forms

Morphology

the + light + be + on + but + nobody's + home

The expression uses a figurative scene (lights on in an empty house) to describe a person's mental state, and that metaphorical mapping to 'mentally absent or unresponsive' is not directly derivable from the literal meanings of the constituents. This pragmatic, culture-specific usage is unpredictable for a B1 learner who only knows the component words, so it should be treated as opaque.

Etymology

The lights are on but nobody's home uses the simple image of a house where the lights are on but nobody's home, so it looks active but is empty. That's why we say this about a person who seems there but is 'not mentally engaged'.