1. [interjection] An exclamation to get attention.
2. [interjection] A protest or reprimand.
3. [interjection] An expression of surprise.
4. [interjection] (US) (Australia) (UK) (Canada) An informal greeting, similar to hi.
5. [interjection] A request for repetition or explanation; an expression of confusion (see also eh, huh).
6. [interjection] A meaningless beat marker or extra, filler syllable in song lyrics.
7. [noun] (country dancing) A choreographic figure in which the dancers weave between one another.
