(idiomatic) To continue or persist, regardless of circumstances or setbacks; to keep trying or striving.

(idiomatic) To avoid confusing or mixing up something; to keep something clear or organized.

(idiomatic) to pay careful attention to a situation or a thing, so that you can deal with any changes or problems.

(chiefly UK) To be introverted; to stay away from others.

(idiomatic) To maintain or continue a positive streak. / (idiomatic) To maintain one's erection.

(idiomatic) To avoid revealing one's thoughts, circumstances, or plans.

(idiomatic) To remain vigilant for someone or something. / (idiomatic) To remain vigilant for a possibly dangerous situation.

To remain vigilant for someone or something. / To remain vigilant for a possibly dangerous situation.

(sailing) Any sailboat having a keel (as opposed to a centerboard or daggerboard).

(informal) Extremely good, exactly right; all right.