i Register
In some senses, lightbulb is marked as colloquial. Watch for register when choosing this word.
lightbulb
UK /ˈlaɪtˌbʌlb/ US /ˈlaɪtˌbʌlb/
noun 2
Definitions
noun
1
Alternative spelling of light bulb.
A young orangutan in the San Diego Zoo became famous for unbolting the screening of his crib, removing the wires, and moving through the zoo nursery, unscrewing lightbulbs.
noun
1
An uninvited third person joining a couple's date who prevents or hinders romantic interactions.
You two go ahead lah, I don't want to be lightbulb.
When she finally came out her friend joined us. Damn lightbulb leh!
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