I'm confused

(one of msn's daily vocab words)

suspire


sus·pire (past and past participle sus·pired, present participle sus·pir·ing, 3rd person present singular sus·pires)


intransitive verb

Definitions:

1. breathe in: to draw in breath

2. sigh: to give a sigh


Aren't breathing in and sighing two slightly different things? Sighing, or at least when I sigh, is a breathing out motion. How can one word define two opposite actions? Or am I just being blonde and missing something painfully obvious which will make me regret posting this?

How would even use that in a sentence? They all come off rather awkward sounding. Hrm...