ha /hɑː/exclamation 5noun 1forms 1 exclamation5 •the sound of someone laughing •An exclamation of triumph or discovery.Ha! Checkmate! •Said when making a vigorous attack."That's well. Well," cried he, now for my turn. Ha! a hit! a hit!" — 1844 •(old-fashioned) A sound of hesitation: er, um. •(no longer used) An exclamation of grief. noun1 •The sum of bodily parts; the physical body. formshas