Rigor is something strict, severe or demanding. 1  Harsh and strict treatment in the military for cadets is an example of rigor. 2  Freezing weather and ice are examples of the rigors of winter.  Difficult and challenging academic courses are an example of academic rigor.
The suffix gram means to draw or write. This is used in telegram.
gm Avoid using this obsolete abbreviation. Former abbreviation for gram. gm gram. GM. abbreviation for Geiger-MÃ¼ller. gm. abbreviation for gram. GM abbrev. genetically manipulated/ genetically modified, for example GM food. Gm, n See gram. gm. gram.