heavy

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heavy

1. having a relatively high density
2. (of soil) having a high clay content; cloggy
3. (of an industry) engaged in the large-scale complex manufacture of capital goods or extraction of raw materials
4. cloudy or overcast, esp threatening rain
5. (of an element or compound) being or containing an isotope with greater atomic weight than that of the naturally occurring element
6. Horse racing (of the going on a racecourse) soft and muddy
7. 
a. a villainous role
b. an actor who plays such a part
8. Scot strong bitter beer
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

… heavy

In R/T (radio telephony) terminology, it means large aircraft in the heavy wake turbulence category (e.g., “Air-India 123 heavy”). The suffix indicates that the aircraft is a large transport, alerting controllers and following aircraft to the possibility of wake turbulence.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
This one is heavy going: Dancing Class: Gender, Ethnicity, and Social Divides in American Dance, 1890-1920 (Indiana University Press.
Even many professional philosophers will find them heavy going. Still, it may be of general interest to take a brief overview of Nozick's project.
Dream Du Grand Val struggled on heavy going in France, while Extra Mag is too short in the market.
He was a useful miler in France but proved his stamina for three miles when second in a Group One event on heavy going at Auteuil.
That run did not go to plan, though, as racing off a career-high mark of 77, Lyric Ballad looked unsuited by the heavy going at Sandown.
Haykasar, Tufashen, Hayrenyats are heavy going. Snow removal operation is continued.
Dave Tainton, PPDG's area operations director who took part in the fundraiser, said: "The walk was said to be between four and five miles and the vast majority of that distance took place in a field and there was a deluge of rain the night before, which certainly made it heavy going.
WALKERS and runners braved heavy going underfoot to complete a 40- mile challenge around Coventry.
Selections and with all five of his wins coming on either soft or heavy going, it's no surprise to see him at Haydock today.
The Darlington-based permit holder has just six horses in his yard, but his 14-1 outsider scored a 15-length victory over Model Son as more well-fancied rivals were left trailing on the heavy going.
Kickham (4.05) will not be troubled by the testing underfoot conditions and ran a cracking race in heavy going at Tipperary three weeks ago.
Meditations from such a source may sound like heavy going but this is not the case.