concern

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To have to do with or relate to: an article that concerns the plight of homeless people.
2. v. To be of interest or importance to: This problem concerns all of us.
3. v. To engage the attention of; involve: We concerned ourselves with accomplishing the task at hand.
4. v. To cause anxiety or uneasiness in: The firm's weak financial posture is starting to concern its stockholders.
5. v. Obsolete To be of importance.
6. n. A matter that relates to or affects one. See Synonyms at affair.
7. n. Regard for or interest in someone or something.
8. n. A troubled or anxious state of mind arising from solicitude or interest. See Synonyms at anxiety.
9. n. A business establishment or enterprise; a firm.
10. n. A contrivance; a gadget.

Century Dictionary and Cyclopedia

1. To relate or pertain to; have an intimate relation to or connection with.
2. To affect the interest of; have interest for; be of importance to.
3. To interest; busy; occupy; engage: used reflexively or in the passive voice: as, to concern one's self in the affairs of others; I was not concerned in that transaction.
4. To disturb; make uneasy or anxious; cause disquiet to; trouble: generally in the past participle: as, to be deeply concerned about the safety of a friend.
5. To confuse with drink; slightly intoxicate: in the past participle.
6. Synonyms To interest, touch, affect.
7. n. That which relates or pertains to one; matter of concernment; business; affair.
8. n. Interest; matter of importance; that which affects one's welfare or happiness.
9. n. Solicitous regard; solicitude; anxiety; agitation or uneasiness of mind; disturbed state of feeling; trouble.
10. n. An establishment or firm for the transaction of business; a manufacturing or commercial establishment; a business house.
11. n. A material object, especially one that is complicated or large; a contrivance: with a touch of depreciation.
12. n. Synonyms Solicitude, etc. (see care); Concern at, about, for (see unconcerned); carefulness, thoughtfulness.

Wiktionary

1. n. That which affects one's welfare or happiness
2. n. The expression of solicitude, anxiety, or compassion toward a thing or person.
3. n. A business, firm or enterprise; a company.
4. v. transitive To be of importance to.
5. v. transitive To make somebody worried.

GNU Webster's 1913

1. v. To relate or belong to; to have reference to or connection with; to affect the interest of; to be of importance to.
2. v. To engage by feeling or sentiment; to interest.
3. v. obsolete To be of importance.
4. n. That which relates or belongs to one; business; affair.
5. n. That which affects the welfare or happiness; interest; moment.
6. n. Interest in, or care for, any person or thing; regard; solicitude; anxiety.
7. n. (Com.) Persons connected in business; a firm and its business.

WordNet 3.0

1. n. something or someone that causes anxiety; a source of unhappiness
2. v. be on the mind of
3. n. a feeling of sympathy for someone or something
4. n. an anxious feeling
5. n. something that interests you because it is important or affects you
6. v. be relevant to
7. n. a commercial or industrial enterprise and the people who constitute it