demonstrate

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To show clearly and deliberately; manifest: demonstrated her skill as a gymnast; demonstrate affection by hugging.
2. v. To show to be true by reasoning or adducing evidence; prove: demonstrate a proposition.
3. v. To present by experiments, examples, or practical application; explain and illustrate: demonstrated the laws of physics with laboratory equipment.
4. v. To show the use of (an article) to a prospective buyer: The salesperson plugged in and demonstrated the vacuum cleaner.
5. v. To give a demonstration: described the dance step, then took a partner and demonstrated.
6. v. To participate in a public display of opinion: demonstrated against tax hikes.

Century Dictionary and Cyclopedia

1. To point out; indicate; make evident; exhibit.
2. Specifically To exhibit, describe, and explain, as the parts of a dissected body; teach by the ocular use of examples, as a physical science, especially anatomy or any of its principles.
3. To establish the truth of; fully establish by arguments; adduce convincing reasons for belief in, as a proposition.

Wiktionary

1. v. To display the method of using an object.
2. v. To show the steps taken to create a logical argument or equation.
3. v. To participate in or organize a demonstration.

GNU Webster's 1913

1. v. To point out; to show; to exhibit; to make evident.
2. v. To show, or make evident, by reasoning or proof; to prove by deduction; to establish so as to exclude the possibility of doubt or denial.
3. v. (Anat.) To exhibit and explain (a dissection or other anatomical preparation).

WordNet 3.0

1. v. establish the validity of something, as by an example, explanation or experiment
2. v. march in protest; take part in a demonstration
3. v. give an exhibition of to an interested audience
4. v. provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes