insane

word

/ˌɪnˈseɪn/
in-SAYN
/ɪnsˈeɪn/
in-SAYN

Definition

Insane can mean mentally very ill, especially in older or legal contexts. In everyday speech, it more often means extremely shocking, intense, or unbelievable.

Usage & Nuances

In modern everyday English, using insane for a person’s mental condition can sound outdated, insensitive, or very strong; words like 'serious mental illness' are often better. Much more commonly, it is informal emphasis: 'insane traffic', 'insane price', 'insane talent'. Similar to 'crazy', but often stronger.

Example Sentences

She has insane talent for someone so young.

natural

That roller coaster is insane.

basic

The noise in this room is insane.

basic

He spent an insane amount of money on shoes.

basic

The traffic was insane, so I got here late.

natural

Working all weekend sounds insane to me.

natural