1. Period when something or someone is attacked or criticized without restraint 
2. Period of the year during which game can be hunted without restriction

Derived forms: open seasons

• oblongness
• obloquy
• obmutescence
• obnoxious
• obnoxiously
• obnoxiousness
• obnubilate
• oboe
• oboe d'amore
• oboe da caccia
• oboist
• obolus
• obovate
• obovate leaf
• obscene
• obscenely
• obscenity
• obscurantism
• obscurantist
• obscuration
• obscure
• obscurely
• obscureness
• obscurity
• obsecrate