The word "machines" has many different definitions, as a machine can be many different things. But the generalized definition is anything that is constructed from various apparatuses.
The fear of answering machines may be defined as telephone phobia. There is no specific word for this type of fear.
A wheel and an axle can be defined as a simple machine.
The name given to a word defined in a dictionary is its entry word or headword.
The word "mechanical" means "of, or pertaining to, machines" - and machines are what mechanical engineers concern themselves with.
Hardening from cold can be defined by the word callous.
A word or phrase defined in a dictionary is called an entry.
me
Natural is defined as "gifts of nature, such as forest, fertile, soil, and water." Human is defined as "the skills people have to produce goods and services." Capital is defined as "the things people make, such as machines and equipment, to produce goods and service."
Having to do with machines.
Airplane, alarm clock, axle and automobile are machines. They begin with the letter a.
Define
That's not a word.