Princeton's WordNet

1. baleful, baneful(adj)

   deadly or sinister

   "the Florida eagles have a fierce baleful look"

2. baleful, forbidding, menacing, minacious, minatory, ominous, sinister, threatening(adj)

   threatening or foreshadowing evil or tragic developments

   "a baleful look"; "forbidding thunderclouds"; "his tone became menacing"; "ominous rumblings of discontent"; "sinister storm clouds"; "a sinister smile"; "his threatening behavior"; "ugly black clouds"; "the situation became ugly"

Wiktionary

1. baleful(Adjective)

   Portending evil; ominous.

2. baleful(Adjective)

   Miserable, wretched, distressed, suffering.

Webster Dictionary

1. Baleful(adj)

   full of deadly or pernicious influence; destructive

2. Baleful(adj)

   full of grief or sorrow; woeful; sad

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