Definition: [verb] make full use of and derive benefit from (a resource).
Example: 500 companies sprang up to exploit this new technology
Definition: [verb] make use of (a situation) in a way considered unfair or underhand.
Example: the company was exploiting a legal loophole
Definition: [noun] a bold or daring feat.
Example: despite a series of colourful exploits, his agents obtained little intelligence of value
Definition: [noun] a software tool designed to take advantage of a flaw in a computer system, typically for malicious purposes such as installing malware.
Example: if someone you don't know tweets you a link, it's either spam, an exploit, or probably both