Extended Strong's Hebrew Lexicon (Brown-Driver-Briggs based)
or
Usage: 1) or, rather 1a) implying that the latter choice is preferred 1b) or if, introducing an example to be seen under a particular principle 1c) (in series) either...or, whether...or 1d) if perchance 1e) except, or else 2) whether, not the least, if, otherwise, also, and, then