Definitions: 1 - annoyingly insensitive or slow to understand - that's me :)
2 - more than 90° less than 180°
3 - not sharp pointed or sharp edged - the one I didn't know!

Scavenger-Hunters are here http://forum.pbase.com/viewtopic.php?f=16&t=43593&sid=44cd4769f1a74ee7d7655ac590ba6aaf