Odd

1. A number not divisible by 2. All prime numbers must be odd numbers.
2. Single; sole; singular; not having a pair. I always end up with odd socks.
3. Singular in looks or character; peculiar. He was an odd looking fellow,
4. Occasional; infrequent. In spelling rules there is always an odd exception.
5. Left over, remaining when the rest have been grouped. I'm the odd one out.
6. Casual, irregular, not planned. He's only worked at odd jobs.
7. (In combination with a number, not comparable) About. There were thirty-odd people in the crowd.