
1) Approaching 2) Imminent 3) In the offing 4) Near 5) Threatening
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https://www.crosswordclues.com/clue/looming

1) Imminent 2) Monthly magazine 3) Ominously indistinct 4) On the horizon 5) Rising into view 6) Seeming imminent
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https://www.crosswordclues.com/clue/looming

Looming is a term found in the study of perception, as it relates directly to psychology. Looming refers to the rapid expansion in the size of any given image. As the image becomes increasingly large on the perceiver`s retina, i.e., when an object looms, there is an automatic physiological response to perceive the object as an approaching object ....
Found on
http://en.wikipedia.org/wiki/Looming

• (p. pr. & vb. n.) of Loom • (n.) The indistinct and magnified appearance of objects seen in particular states of the atmosphere. See Mirage.
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http://thinkexist.com/dictionary/meaning/looming/

(from the article `mirage`) Sometimes, as over a body of water, a cool, dense layer of air underlies a heated layer. An opposite phenomenon will then prevail (see Figure 2), in ... ...the mariner on the horizon. Powerful lights can usually be seen over the horizon because the light is scattered upward by particles of water ... [2 rel...
Found on
http://www.britannica.com/eb/a-z/l/71
Loom'ing noun The indistinct and magnified appearance of objects seen in particular states of the atmosphere. See
Mirage .
Found on
http://www.encyclo.co.uk/webster/L/60

a mirage in which objects below the horizon seem to be raised above their true positions.
Found on
https://www.infoplease.com/dictionary/looming
No exact match found.