a covering for the head-one usually with a visor but without a brim, for men and boys-one of lace, muslin, etc., for women, or infants-one used as the mark or ensign of some rank, office, or dignity, as that of a cardinal.-the top, or uppermost part; the chief.-a respectful uncovering of the head.-the whole top of the head of a bird from the base of the bill to the nape of the neck.-anything resembling a cap in form, position, or use-the uppermost of any assemblage of parts; as, the cap of column, door, etc.; a capital, coping, cornice, lintel, or plate.-something covering the top or end of a thing for protection or ornament.-a collar of iron or wood used in joining spars, as the mast and the topmast, the bowsprit and the jib boom; also, a covering of tarred canvas at the end of a rope.-a percussion cap. see under percussion.-the removable cover of a journal box.-a portion of a spherical or other convex surface.-a large size of writing paper; as, flat cap; foolscap; legal cap.-to cover with a cap, or as with a cap; to provide with a cap or cover; to cover the top or end of; to place a cap upon the proper part of; as, to cap a post; to cap a gun.-to deprive of cap.-to complete; to crown; to bring to the highest point or consummation; as, to cap the climax of absurdity.-to salute by removing the cap.-to match; to mate in contest; to furnish a complement to; as, to cap text; to cap proverbs.-to uncover the head respectfully.