The song received mixed reviews. William Goodman of Spin gave it a positive review, describing it as "a well-crafted pop-rock song with spare piano interludes, never-overbearing drums, and a big, song-capping vocal with polished guitar solos." According to Goodman, the song opens with a funk-inspired jangly guitar riff and drops into a bass guitar and keyboard section, accompanying Billy Corgan's nasal singing. He also praised Mike Byrne's drumming skills. Nevertheless, Sean Highkin of Beats Per Minute panned the song. He wrote that "Widow” is clearly trying to be a guitar-driven anthem in the “Zero”/”Here is No Why” vein, but the annoyingly clean production makes it sound like a rejected Zeitgeist Best Buy bonus track." He also criticized Byrne's drumming in contrast to Goodman and called the song as "worse Mellon Collie disc-two duds like “X.Y.U.”."The Wall Street Journal also indicated that the song has a "mid-career Beatles-like feel, with a bright melody and expansive production."