(US, Canada) A brand of dessert made from gelatin. / (by extension) Any brand of fruit flavored gelatin dessert mix.

(computing, electrical engineering) input/output

Alternative spelling of will o' the wisp

The national anthem of Canada

(Internet slang) Expressing interest, usually with implied sarcasm or disdain.

(informal, dated) Term of address for a man.

Initialism of use and occupancy: an official authorization or permit to inhabit a building or dwelling, usually issued upon successful completion of a final building inspection after construction or renovation is complete. Also referred to as a certificate of occupancy or occupancy permit.

Alternative form of triple O

(Australia) Phonetic rendition of Australia′s emergency services telephone number, 000.

(US) A one-on-one.